Mutated non-primate lentiviral env proteins and their use as drugs

ABSTRACT

A pharmaceutical composition includes, as active substance a mutated non-primate lentiviral Env protein having decreased immunosuppressive properties, substantially no immunosuppressive properties or no immunosuppressive properties, or a variant of the mutated lentiviral Env protein, or a fragment of the above proteins, in association with a pharmaceutically acceptable carrier.

The present invention relates to mutated non-primate lentiviral ENV proteins and their use as drugs.

Lentivirus is a genus of slow viruses of the Retroviridae family, characterized by a long incubation period. Lentiviruses have the unique ability among retroviruses of being able to integrate into the DNA of the host and replicate in non-dividing cells. They are in most cases pathogenic, infection resulting in a severe immunodeficiency syndrome (AIDS).

Lentiviruses can be found in primates including humans (HIV1, HIV2) and monkeys (SIV), as well as in other animals.

As examples of animal lentiviruses, one may cite feline lentiviruses such as Feline Imunodeficiency Virus (FIV) which can be found in cats, as well as in other felidae (e.g. lion, cougar).

Other examples of animal lentiviruses are bovine immunodeficiency virus (BIV), Jembrana disease virus (JDV, BIV from Indonesia), equine infectious anaemia virus (EIAV), caprine arthritis encephalitis virus (CAEV), Visna/Maedi virus (VMV) and ovine Visna/Maedi virus (OMVV).

Feline imunodeficiency virus (FIV) causes an AIDS-like syndrome in the domestic cat, with marked similarity to AIDS caused by human immunodeficiency virus (HIV) in humans. FIV in cats typically manifests itself as a transient acute-phase syndrome, characterized by febrile episodes, lymphadenopathy, neutropenia, and weight loss. This initial phase is followed by a protracted asymptomatic period with progressive loss of CD4+T lymphocytes and a terminal AIDS phase characterized by succumbing to opportunistic infections. Variability exists among FIV strains, not only in sequence relatedness but also in pathogenicity in vivo. FIV has been reported worldwide with a prevalence rate ranging from 1 to 28%. It affects 2-4% of cats in the US.

Following criteria similar to those for HIV subgroups distinction, FIV has been classified into subgroups according to the envelop protein (Env) diversity. Sodora et al. defined the original Petaluma strain as a prototype subgroup A and the divergent Japanese TM2 strain as prototype subgroup B. A majority of FIV sequences obtained worldwide were categorized in the A and B subgroups. A subtype C was also defined and is the least prevalent FIV subgroup, as well as two other subtypes D and E.

As in the case of HIV, the development of an effective vaccine against FIV is difficult because of the variations of the virus strains, most probably associated with the high intrinsic mutation rate of its replicative machinery. A dual-subtype vaccine for FIV released in 2002 called Fel-O-Vax was shown to have some protective effect against subtypes A and B FIV, but a more effective vaccine is still needed for an efficient protection of cats.

A key feature that could result in higher efficacy of a FIV dedicated vaccine is to increase the immunogenicity of the FIV antigens that are introduced in the vaccine. In this respect, it is essential to ascertain that the antigens do not carry an immunosuppressive activity, which would severely decrease the immunogenicity of the vaccine. In fact, most vaccines against retroviruses contain the Env protein as it is the first exposed viral protein to be <<seen>> by the immune system of an infected animal, and it is important for a vaccinated animal to be able to mount an efficient line of defence against this protein. Yet, it has been shown in the case of the non-lentiviral retroviruses—including oncoretroviruses such as the feline FeLV or the human HTLV retroviruses—that their Env protein carries an immunosuppressive activity which drastically decreases the immunogenicity of the corresponding proteins, and severely impairs the efficacy of a vaccine expressing the Env protein.

Consequently for a vaccine, there is a need to provide proteins as antigens having lost, or substantially lost, their immunosuppressive functions, in order to generate an efficient response. This will enable the animals once infected by the virus to allow the immune system to destroy the infected cells and prevent/cure the infection.

One aim of the invention is to provide new mutated Env proteins devoid of immunosuppressive properties.

Another aim of the invention is to provide new mutated animal Env proteins.

Another aim of the invention is to provide a new pharmaceutical composition efficient for preventing/treating lentiviral infection.

Another aim of the invention is to provide an efficient vaccine against animal lentiviruses, in particular feline lentiviruses.

The invention relates to a pharmaceutical composition comprising as active substance an isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

said mutated feline lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type feline lentiviral ENV protein,

said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 5,

said mutated feline lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein,

-   -   X₁ is any amino acid different from E or deleted, and/or     -   X₂ is any amino acid different from K or deleted, and/or     -   X₃ is any amino acid different from F or deleted, and/or     -   X₄ is any amino acid different from L or deleted, and/or     -   X₅ is any amino acid different from Y or deleted,         in association with a pharmaceutically acceptable carrier.

In particular, the invention relates to a pharmaceutical composition comprising as active substance an isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

in particular said fragment of said isolated mutated feline lentiviral ENV protein comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated feline lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type feline lentiviral ENV protein,

said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 5,

said mutated feline lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein,

-   -   X₁ is A, F, G, L or R, and X₂, X₃, X₄ and X₅ are any amino acid,         or     -   X₂ is A, F, G, L or R, and X₁, X₃, X₄ and X₅ are any amino acid,         or     -   X₃ is A, G, L or R, and X₁, X₂, X₄ and X₅ are any amino acid, or     -   X₄ is A, F, G or R, and X₁, X₂, X₃ and X₅ are any amino acid, or     -   X₅ is A, F, G, L or R, and X₁, X₂, X₃ and X₄ are any amino acid,         in association with a pharmaceutically acceptable carrier.

The present application is based on the unexpected observation made by the Inventors that some specific amino acids of the immunosuppressive domain (ISU) of a lentiviral Env protein can be mutated conferring to said lentiviral Env protein decreased immunosuppressive properties, substantially no immunosuppressive properties or no immunosuppressive properties, while retaining its antigenicity, the three-dimensional structure of the immunosuppressive domain, and its expression at the plasma membrane.

The expression “having decreased immunosuppressive properties” means that the mutated Env protein has lost at least 50% of its immunosuppressive activity in comparison to the immunosuppressive activity of the wild type Env protein.

The expression “having substantially no immunosuppressive properties” means that the mutated Env protein has lost at least 75% of its immunosuppressive activity in comparison to the immunosuppressive activity of the wild type Env protein.

The expression “having no immunosuppressive properties” means that the mutated Env protein has lost 100% of its immunosuppressive activity in comparison to the immunosuppressive activity of the wild type Env protein.

Moreover, the mutated lentiviral Env protein according to the invention has retained a part or the totality of its fusogenic activity.

In the invention, the expression “mutated feline lentiviral ENV proteins” means that the ENV proteins derive from the expression of an env gene of a lentivirus of a feline.

Feline lentiviruses according to the invention encompass the FIV which can be found in cats, as well as in other felidae (e.g. lion, cougar).

Because of the natural variability of feline lentiviruses, the “mutated Env protein”, as defined in the invention, encompasses two meanings.

According to the first meaning, the said “mutated ENV protein” is the unnatural result of the intervention of human beings.

According to the second meaning, the mutated Env protein also encompasses naturally occurring variants for which up to now the non immunosuppressive properties remain unknown.

This second meaning takes into consideration the natural variability of FIV variants inside a same infected animal, wherein the said “mutated Env protein” might be non immunosuppressive but its property is undetectable because an FIV infected animal carries many FIV variants, the majority of which is immunosuppressive.

The following protein (Accession No. P16090) corresponds to the wild type sequence of the Env protein of FIV (Petaluma strain). In the invention, it is considered as a reference sequence of the wild type ENV protein.

wild type FIV Env (Petaluma strain) SEQ ID NO: 4 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGVNPFRVPGI TEKEKQNYCNILQPKLQDLRNEIQEVKLEEGNAGKFRRARFLRYSDE RVLSLVHAFIGYCIYLGNRNKLGSLRHDIDIEAPQEECYNNREKGTT DNIKYGRRCCLGTVTLYLILFTGVIVYSQTAGAQVVWRLPPLVVPVE ESEIIFWDCWAPEEPACQDFLGAMIHLKAKTNISIREGPTLGNWARE IWATLFKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIVPDY QCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLSYCTDPLQIPLI NYTFGPNQTCMWNTSQIQDPEIPKCGWWNQMAYYNSCKWEEAKVKFH CQRTQSQPGSWFRAISSWKQRNRWEWRPDFKSKKVKISLPCNSTKNL TFAMRSSGDYGEVTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDT SLIDTCGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDLIVHF NMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTNSSSSYSGTKMACP SNRGILRNWYNPVAGLRQSLEQYQVVKQPDYLLVPEEVMEYKPRRKR AAIHVMLALATVLSIAGAGTGATAIGMVTQYHQVLATHQEAIEKVTG ALKINNLRLVTLEHQVLVIGLKVEAMEKFLYTAFAMQELGCNQNQFF CKIPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKFYEIIMD IEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLKGLLGGILGIGLGVL LLILCLPTLVDCIRNCIHKILGYTVIAMPEVEGEEIQPQMELRRNGR QCGMSEKEEE

Variants of the FIV mutated Env proteins according to the invention have at least 70%, preferably at least 80%, more preferably at least 90% of identity with the wild type amino acid sequence of the FIV Env protein, and comprise the mutations as described above, and harbour a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity.

A region of the feline lentiviral Env protein containing the amino acids which may be mutated according to the invention can be delimited by the sequence SEQ ID NO: 2:

(SEQ ID NO: 2) G-L-[K/T/R]-[V/I]-[E/R]-A-[I/M/T/L]-E-K-[F/P]- [L/V/I]-Y-T-A-[F/L]-A-M.

SEQ ID NO: 2 corresponds to the consensus sequence of a specific region of the ISU domain. In the invention, the ISU domain comprises SEQ ID NO: 2.

When applying the mutations as defined above, the ISU domain of the Env protein loses partially or totally its immunosuppressive properties.

Examples of fragments of the wild type ISU domains of FIV:

Examples of fragments of the wild type ISU domains of FIV: (SEQ ID NO: 6) AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKFLYTAFAMQELGCNQ NQFFCKIPLELWTR (SEQ ID NO: 7) AVEKVTEALKINNLRLVTLEHQVLVIGLKVEAMEKFLYTAFAMQELGCNQ NQFFCKIPPELWTR (SEQ ID NO: 8) AIEKVTEALKITNLRLVTLEHQVLVIGLKVEAMEKFLYTAFAMQELGCNQ NQFFCKVPPELWRR (SEQ ID NO: 9) AIEKVTEALKINNLRLVTLEHQVLVIGLKVEAIEKFLYTAFAMQELGCNQ NQFFCKVPLELWRR (SEQ ID NO: 10) AIEKVTEALKINNLRLVTLEHQVLVIGLKVEAMEKFLYTAFAMQELGCNQ NQFFCKVPSALWER (SEQ ID NO: 11) AIEKVTEALKINNLRLVTLEHQVLVIGLKVEAMEKFLYTAFAMQELGCNQ NQFFCKIPPGLWTR (SEQ ID NO: 12) AIEKVTEALKINNLRLVTLEHQVLVIGLKVEAMEKFLYTAFAMQELGCNQ NQFFCKVPPQLWKR (SEQ ID NO: 13) AIEKVTEALKVNNLRLITLEHQVLVIGLKVEAMEKFLYTAFAMQELGCNQ NQFFCKVPPELWKR (SEQ ID NO: 14) TIEKVTEALKINNLRLVTLEHQVLVIGLKVEAMEKFLYTAFAMQELGCNQ NQFFCKVPPELWKR (SEQ ID NO: 15) AIEKVTEALKINNLRLVTLEHQVLVIGLKVEAMEKFLYTAFAMQELGCNQ NQFFCKVPPVLWER (SEQ ID NO: 16) TIEKITEALKVNNLRLVTLEHQVLVIGLKVEAIEKFLYTAFAMQELGCNQ NQFFCKVPPELWQR (SEQ ID NO: 17) AIDQITEALKINNLRLVTLEHQVLVIGLKVEAIEKFIYTAFAMQELGCNQ NQFFCKIPPELWIR (SEQ ID NO: 18) ALDKITEALKINNLRLITLEHQVLVIGLKVEAIEKFLYTAFAMQELGCNQ NQFFCKIPPSLWSM (SEQ ID NO: 19) ALDKITEALKINNLRLVTLEHQVLVIGLKVEATEKFLYTAFAMQELGCNQ NQFFCKIPCELWMR (SEQ ID NO: 20) ALEKITEALKINNLRLVTLEHQVLMIGLKVEAIEKFLYTAFAMQELGCNQ NQFFCKIPLNLWTM (SEQ ID NO: 21) ALDKITEALKINNLRLITLVHQVLVIGLKVRAIEKPLYTAFAMQELGCNQ NQFFCKIPPSLWSM (SEQ ID NO: 22) ALEKITEALKINNLRLITLEHQVLVIGLRVEAIEKFLYTAFAMQELGCNQ NQFFCKIPPSLWSM (SEQ ID NO: 23) ALEKITEALKINNLRLITLEHQVLVIGLKVEAIEKFLYTAFAMQELGCHQ NQFFCKIPPSLWSM (SEQ ID NO: 24) ALDKITEALKINNLRLITLEHQVLVIGLKVEAIEKFLYTAFAMQELGCNQ NQFFCKIPPSLWSM (SEQ ID NO: 25) ALDKITQALKINNLRLITLEHQVLVIGLKVEAIEKFLYTAFAMQELGCNQ NQFFCKIPPSLWSM (SEQ ID NO: 26) ALDKITEALKINNLRLITLEHQVLVIGLKVEAIEKFLYTAFAMQELGCNQ NQFFCKIPLNLWNM (SEQ ID NO: 27) ALDKITEALKINNLRLVTLEHQMLVIGLKVEAIEKFLYTAFAMQELGCNQ NQFFCEIPKELWLR

The localization of an ISU domain can be determined in all Env proteins of viruses as described in Benit et al. 2001, Journal of Virology, Vol. 75, No. 23, p. 11709-11719. In a broad meaning, the ISU domain is defined by its structure and its localization, irrespective of the fact that it possesses or not an immunosuppressive activity.

In the invention, the ISU domain refers to a specific domain in which a mutation can affect the immunosuppressive property of the ENV protein.

As an example of a mutated feline lentiviral Env protein, SEQ ID NO: 5 corresponds to the sequence of a mutated Env protein of the FIV Petaluma strain. In the invention, it is considered as a reference sequence of the mutated Env protein.

More specifically, SEQ ID NO: 5 corresponds to the SEQ ID NO: 4 in which the amino acid residue F in position 5 (X₃) of the sequence A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A (SEQ ID NO: 1) has been substituted by R.

mutated FIV Env SEQ ID NO: 5 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGVNPFRV PGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGNAGKFRRARF LRYSDERVLSLVHAFIGYCIYLGNRNKLGSLRHDIDIEAPQEEC YNNREKGTTDNIKYGRRCCLGTVTLYLILFTGVIVYSQTAGAQV VWRLPPLVVPVEESEIIFWDCWAPEEPACQDFLGAMIHLKAKTN ISIREGPTLGNWAREIWATLFKKATRQCRRGRIWKRWNETITGP SGCANNTCYNVSVIVPDYQCYLDRVDTWLQGKINISLCLTGGKM LYNKVTKQLSYCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIP KCGWWNQMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGEVTGAW IEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDTCGNTPNVSG ANPVDCTMYSNKMYNCSLQNGFTMKVDDLIVHFNMTKAVEMYNI AGNWSCTSDLPSSWGYMNCNCTNSSSSYSGTKMACPSNRGILRN WYNPVAGLRQSLEQYQVVKQPDYLLVPEEVMEYKPRRKRAAIHV MLALATVLSIAGAGTGATAIGMVTQYHQVLATHQEAIEKVTGAL KINNLRLVTLEHQVLVIGLKVEAMEKRLYTAFAMQELGCNQNQF FCKIPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKFYE IIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLKGLLGGIL GIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAMPEVEGEEIQ PQMELRRNGRQCGMSEKEEE

The invention also encompasses the variants of the “mutated feline lentiviral Env protein”, harbouring the above mentioned mutations, and conferring a decrease or a lack of immunosuppressive properties to said variant.

Variants of the FIV mutated Env proteins according to the invention have at least 70%, preferably at least 80%, more preferably at least 90% of identity with the reference mutated sequence of FIV env protein (SEQ ID NO: 5), and comprise the mutations as described above, and harbour a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity.

Variants of the FIV mutated Env proteins according to the invention have at least 90% of identity with the transmembrane region of SEQ ID NO 5

According to a particular embodiment of the invention, variants of the FIV mutated Env proteins according to the invention have a transmembrane region which has at least 90% of identity with the transmembrane region of the FIV mutated Env protein, said variants comprising a mutated immunosuppressive domain (ISU) containing the sequence SEQ ID NO: 1.

According to another particular embodiment of the invention, variants of the FIV mutated Env proteins according to the invention have a 64 amino acid sequence, corresponding to a fragment of the ISU domain, which has at least 95% of identity with a 64 amino acid sequence of the FIV mutated Env protein comprising the sequence SEQ ID NO: 1.

In a particular embodiment, the invention relates to a pharmaceutical composition as defined above comprising as active substance an isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof, said mutated feline lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type feline lentiviral ENV protein,

said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 5,

said mutated feline lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 3) [V/I]-[E/R]-A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A-[F/L]- A-M, wherein,

-   -   X₁ is any amino acid different from E or deleted, and/or     -   X₂ is any amino acid different from K or deleted, and/or     -   X₃ is any amino acid different from F or deleted, and/or     -   X₄ is any amino acid different from L or deleted, and/or     -   X₅ is any amino acid different from Y or deleted,         in particular, wherein,     -   X₁ is A, F, G, L or R, and X₂, X₃, X₄ and X₅ are any amino acid,         or     -   X₂ is A, F, G, L or R, and X₁, X₃, X₄ and X₅ are any amino acid,         or     -   X₃ is A, G, L or R, and X₁, X₂, X₄ and X₅ are any amino acid, or     -   X₄ is A, F, G or R, and X₁, X₂, X₃ and X₅ are any amino acid, or     -   X₅ is A, F, G, L or R, and X₁, X₂, X₃ and X₄ are any amino acid,         in association with a pharmaceutically acceptable carrier.

SEQ ID NO: 3 (14 amino acid long) is a consensus sequence containing SEQ ID NO: 1 (9 amino acid long).

The invention relates to a pharmaceutical composition as defined above comprising as active substance an isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

said mutated feline lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type feline lentiviral ENV protein, said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 5,

said mutated feline lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein,

-   -   X₁ is any amino acid different from E or deleted, and/or     -   X₂ is any amino acid different from K or deleted, and/or     -   X₃ is any amino acid different from F or deleted, and/or     -   X₄ is any amino acid different from L or deleted, and/or     -   X₅ is any amino acid different from Y or deleted,         in particular, wherein,     -   X₁ is A, F, G, L or R, and X₂, X₃, X₄ and X₅ are any amino acid,         or     -   X₂ is A, F, G, L or R, and X₁, X₃, X₄ and X₅ are any amino acid,         or     -   X₃ is A, G, L or R, and X₁, X₂, X₄ and X₅ are any amino acid, or     -   X₄ is A, F, G or R, and X₁, X₂, X₃ and X₅ are any amino acid, or     -   X₅ is A, F, G, L or R, and X₁, X₂, X₃ and X₅ are any amino acid,         in association with a pharmaceutically acceptable carrier,

said decrease, substantial absence or absence of immunosuppressive activity of the above mentioned mutated feline lentiviral ENV protein or of the above defined fragment being liable to be assessed by the fact that in an in vivo assay involving engrafted tumor cells rejection, in animals excluding human beings,

said tumor cells being transduced either so as to express said mutated ENV protein or said fragment (mutated ENV tumor cells),

or said tumor cells being transduced so as to express said wild type ENV protein or a fragment thereof (wild type ENV tumor cells),

or said tumor cells being not transduced (normal tumor cells), the following ratio:

immunosuppression index of said mutated ENV protein or of said fragment (i_(mutated env))/immunosuppression index of wild type ENV protein (i_(wild type env)) is less than 0.5, or even less than 0.25,

i_(mutated env) being defined by: (maximum area reached by mutated ENV tumor cells−maximum area reached by normal tumor cells)/(maximum area reached by normal tumor cells), and

i_(wild type env) being defined by: (maximum area reached by wild type ENV tumor cells−maximum area reached by normal tumor cells)/(maximum area reached by normal tumor cells).

The immunosuppressive property of the ENV protein is preferably measured using in vivo procedures, which are representative of the physiological environment.

The immunosuppressive property of the mutated ENV proteins according to the invention is measured according to an in vivo procedure to assay the immunosuppressive activity of a ENV protein disclosed previously [Mangeney and Heidmann Proc Natl Acad Sci USA 1998; 95: 14920-14925; Mangeney et al. Proc Natl Acad Sci USA, 2007, 104(51):20534-9].

As a physiological test, this in vivo procedure is performed using ENV proteins, or fragment thereof, which are not associated to another component or carrier proteins, such as BSA.

Briefly, a wild-type (wild type lentiviral ENV protein) or modified nucleic acid expressing the protein to be tested (mutated lentiviral ENV protein) is transduced in tumour cell lines such as MCA 205 or C18.1 cell lines by known transduction methods. The tumour cells expressing the protein to be tested are then injected especially subcutaneous (s.c.) injection to a host, generally mice. Following said injection, the establishment of tumour or, to the contrary, its rejection, is determined and the tumour area is measured. Tumour establishment is determined by palpation and tumour area (mm²) is determined by measuring perpendicular tumour diameters. Immunosuppression index is defined as i=(S_(env)−S_(none))/S_(none), wherein S_(env) is the maximum area reached by a tumour expressing an envelope protein and S_(none) is the maximum area reached by a tumour not expressing ENV protein (negative control). According to an embodiment of the invention, the above defined ratio relative to the immunosuppression index (i_(mutated env)/i_(wild type env)) can be less than 0.25, and can even have a negative value (see FIG. 3).

In vitro assay could be carried out, using high doses of synthetic peptides but they are indirect and less convincing, since the expression “immunosuppressive” is relevant when applied to animals possessing a complete immune system and not to cell lines. An additional difficulty for the functional characterization of an ISU domain relies on the fact that the ISU carried by the retroviral Env proteins is a highly structured proteic domain, with trimer formation within the complete Env proteins (Caffrey M., Biochimica et Biophysica Acta, 1536:116-122, 2001; Caffrey et al., The EMBO Journal, Vol. 17, No. 16, p. 4572-4584, 1998). Such structures are not naturally formed with ISU peptides of limited length, and this is most probably why most studies carried out with peptides provide irrelevant results and/or are dependent on specific coupling of the peptides to carrier proteins (such as BSA, e.g. Denner et al., Current Science, AIDS 1994, 8:1063-1072).

As mentioned above, the Env proteins according to the invention are mutated. This mutation is made in vitro. Thus, the mutated Env proteins according to the invention are isolated, and do not correspond to naturally occurring counterpart.

As mentioned above, the lentiviral mutated Env proteins have decreased immunosuppressive properties, substantially no immunosuppressive properties or no immunosuppressive properties. This means that the mutated Env proteins according to the invention have no, or have reduced immunosuppressive properties with respect to the natural non mutated Env proteins from a virus of the same species. For instance, a mutated FIV Env protein according to the invention has reduced immunosuppressive properties with respect to the wild type FIV Env protein.

In the invention, the terms “a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity” means that the mutated Env proteins according to the invention have an immunosuppressive index less than about 50 or 25% of that of the wild type Env protein [Mangeney and Heidmann Proc Natl Acad Sci USA 1998; 95: 14920-14925; Mangeney et al. Proc Natl Acad Sci USA, 2007, 104(51):20534-9].

In the invention, structures responsible for the antigenicity of the mutated lentiviral ENV protein are essentially preserved.

As intended herein, the expression “structures responsible for antigenicity” relates to structures of the protein which are liable to interact with components of the immune system such as antibodies or membrane receptors of immune cells, in particular T cells.

The mutation(s) within the immunosuppressive domain of the lentiviral Env proteins is (are) sufficient to decrease the immunosuppressive activity of the mutated lentiviral Env protein with respect to the corresponding wild type Env. However, it might be advantageous that another amino acid be also mutated because it ensures that the structure of the mutated Env protein is essentially conserved with respect to the corresponding wild type Env protein.

The mutated lentiviral Env protein has substantially retained the structure, especially the antigenic structure, e.g., immunogenic determinants, of the original determined lentiviral Env protein, i.e. the wild type non mutated lentiviral Env protein.

These properties can be evaluated by testing the ability of the Env proteins to be normally expressed at the cell membrane under conditions which preserve the surface and transmembrane subunits (SU:TM) interactions and recognition by specific anti-Env antibodies, and by measuring the functional fusogenic activity of said mutated lentiviral Env with respect to the same properties in the wild type non mutated lentiviral Env protein (see examples).

Generally speaking, the mutated ENV protein involved in the present invention has an average length of about 750 to about 1000 amino acids.

The invention encompasses fragments of the mutated ENV protein as defined above, provided that said fragment:

-   -   comprises at least the sequence SEQ ID NO: 1, as defined above,     -   comprises at least 40 amino acids, preferably comprises at least         50 amino acids,     -   has decreased immunosuppressive properties, substantially no         immunosuppressive properties or no immunosuppressive properties,         as defined above,     -   preferably, comprises the extracellular parts of the ENV         protein,     -   retains the structure of the ENV protein from which it derives,     -   harbours the same epitopes as the corresponding fragment in the         wild type ENV protein.

According to a particular embodiment, the fragment of the mutated ENV protein of the invention can comprise about 40, 50, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950 amino acids. These values are given only in an illustrative way, as the man skilled in the art will understand that the fragment can comprise any number of amino acids comprised from about 40 to about 950 amino acids.

Advantageously, the fragments according to the invention are such that, while retaining the antigenic structure of the full length mutated ENV protein, and thus of the wild type ENV protein, they have lost major antigenic regions that are responsible for antigenicity in another region than the region corresponding to the immunosuppressive domain, because said regions could be detrimental for targeting an immune response against the immunosuppressive domain.

The invention also relates to a pharmaceutical composition wherein the active substance is an isolated non naturally occurring feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, as above defined, or fragments thereof.

In a particular embodiment, the invention relates to a pharmaceutical composition as defined above wherein:

-   -   X₁ is any amino acid different from E or deleted, and X₂, X₃, X₄         and X₅ are any amino acid, or     -   X₂ is any amino acid different from K or deleted, and X₁, X₃, X₄         and X₅ are any amino acid, or     -   X₃ is any amino acid different from F or deleted, and X₁, X₂, X₄         and X₅ are any amino acid, or     -   X₄ is any amino acid different from L or deleted, and X₁, X₂, X₃         and X₅ are any amino acid, or     -   X₅ is any amino acid different from Y or deleted, and X₁, X₂, X₃         and X₄ are any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, and X₃, X₄ and X₅ are         any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₃ is any         amino acid different from F or deleted, and X₂, X₄ and X₅ are         any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₄ is any         amino acid different from L or deleted, and X₂, X₃ and X₅ are         any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₅ is any         amino acid different from Y or deleted, and X₂, X₃ and X₄ are         any amino acid, or     -   X₂ is any amino acid different from K or deleted, X₃ is any         amino acid different from F or deleted, and X₁, X₄ and X₅ are         any amino acid, or     -   X₂ is any amino acid different from K or deleted, X₄ is any         amino acid different from L or deleted, and X₂, X₄ and X₅ are         any amino acid, or     -   X₂ is any amino acid different from K or deleted, X₅ is any         amino acid different from Y or deleted, and X₂, X₃ and X₄ are         any amino acid, or     -   X₃ is any amino acid different from F or deleted, X₄ is any         amino acid different from L or deleted, and X₂, X₄ and X₅ are         any amino acid, or     -   X₃ is any amino acid different from F or deleted, X₅ is any         amino acid different from Y or deleted, and X₂, X₃ and X₄ are         any amino acid, or     -   X₄ is any amino acid different from L or deleted, X₅ is any         amino acid different from Y or deleted, and X₂, X₄ and X₅ are         any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, X₃ is any amino acid         different from F or deleted, and X₄ and X₅ are any amino acid,         or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, X₄ is any amino acid         different from L or deleted, and X₃ and X₅ are any amino acid,         or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, X₅ is any amino acid         different from Y or deleted, and X₃ and X₄ are any amino acid,         or     -   X₁ is any amino acid different from E or deleted, X₃ is any         amino acid different from F or deleted, X₄ is any amino acid         different from L or deleted, and X₂ and X₅ are any amino acid,         or     -   X₁ is any amino acid different from E or deleted, X₃ is any         amino acid different from F or deleted, X₅ is any amino acid         different from Y or deleted, and X₂ and X₄ are any amino acid,         or     -   X₁ is any amino acid different from E or deleted, X₄ is any         amino acid different from L or deleted, X₅ is any amino acid         different from Y or deleted, and X₂ and X₃ are any amino acid,         or     -   X₂ is any amino acid different from K or deleted, X₃ is any         amino acid different from F or deleted, X₄ is any amino acid         different from L or deleted, and X₁ and X₅ are any amino acid,         or     -   X₂ is any amino acid different from K or deleted, X₃ is any         amino acid different from F or deleted, X₅ is any amino acid         different from Y or deleted, and X₁ and X₄ are any amino acid,         or     -   X₂ is any amino acid different from K or deleted, X₄ is any         amino acid different from L or deleted, X₅ is any amino acid         different from Y or deleted, and X₁ and X₃ are any amino acid,         or     -   X₃ is any amino acid different from F or deleted, X₄ is any         amino acid different from L or deleted, X₅ is any amino acid         different from Y or deleted, and X₁ and X₂ are any amino acid,         or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, X₃ is any amino acid         different from F or deleted, X₄ is any amino acid different from         L or deleted, and X₅ is any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, X₃ is any amino acid         different from F or deleted, X₅ is any amino acid different from         Y or deleted, and X₄ is any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, X₄ is any amino acid         different from L or deleted, X₅ is any amino acid different from         Y or deleted, and X₃ is any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₃ is any         amino acid different from F or deleted, X₄ is any amino acid         different from L or deleted, X₅ is any amino acid different from         Y or deleted, and X₂ is any amino acid, or     -   X₂ is any amino acid different from K or deleted, X₃ is any         amino acid different from F or deleted, X₄ is any amino acid         different from L or deleted, X₅ is any amino acid different from         Y or deleted and X₁ is any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, X₃ is any amino acid         different from F or deleted, X₄ is any amino acid different from         L or deleted and X₅ is any amino acid different from Y or         deleted.

In a particular embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said mutated immunosuppressive domain contains the amino acid sequence SEQ ID NO: 1 or SEQ ID NO: 3, wherein:

-   -   X₁ is A, F, G, L or R, X₂ is A, F, G, L or R, and X₃, X₄ and X₅         are any amino acid, or     -   X₁ is A, F, G, L or R, X₃ is A, G, L or R, and X₂, X₄ and X₅ are         any amino acid, or     -   X₁ is A, F, G, L or R, X₄ is A, F, G or R, and X₂, X₃ and X₅ are         any amino acid, or     -   X₁ is A, F, G, L or R, X₅ is A, F, G, L or R, and X₂, X₃ and X₄         are any amino acid, or     -   X₂ is A, F, G, L or R, X₃ is A, G, L or R, and X₁, X₄ and X₅ are         any amino acid, or     -   X₂ is A, F, G, L or R, X₄ is A, F, G or R, and X₁, X₃ and X₅ are         any amino acid, or     -   X₂ is A, F, G, L or R, X₅ is A, F, G, L or R, and X₁, X₃ and X₄         are any amino acid, or     -   X₃ is A, G, L or R, X₄ is A, F, G or R, and X₁, X₂ and X₅ are         any amino acid, or     -   X₃ is A, G, L or R, X₅ is A, F, G, L or R, and X₁, X₂ and X₄ are         any amino acid, or     -   X₄ is A, F, G or R, X₅ is A, F, G, L or R, and X₁, X₂ and X₃ are         any amino acid.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein:

X₁ is any amino acid different from E or deleted, and/or

-   -   X₂ is any amino acid different from K, or deleted, and/or     -   X₃ is any amino acid different from F, P or deleted, and/or     -   X₄ is any amino acid different from L, V, I or deleted, and/or     -   X₅ is any amino acid different from Y or deleted.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein:

-   -   X₁ is any amino acid different from E or deleted, and/or     -   X₂ is any amino acid different from K, A, N, Y, R or deleted,         and/or     -   X₃ is any amino acid different from F, P or deleted, and/or     -   X₄ is any amino acid different from L, V, I or deleted, and/or     -   X₅ is any amino acid different from Y, K, E, Q, R, A or deleted.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein:

-   -   X₁ is R, G, L, A, F or deleted, and/or     -   X₂ is R, G, L, A, F or deleted, and/or     -   X₃ is R, G, L, A, or deleted, and/or     -   X₄ is R, G, A, F or deleted, and/or     -   X₅ is R, G, L, A, F or deleted.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein:

-   -   X₁ is R, G, L, A, F or deleted, and X₂, X₃, X₄ and X₅ are any         amino acid, or     -   X₂ is R, G, L, A, F or deleted, and X₁, X₃, X₄ and X₅ are any         amino acid, or     -   X₃ is R, G, L, A or deleted, and X₁, X₂, X₄ and X₅ are any amino         acid, or     -   X₄ is R, G, A, F or deleted, and X₁, X₂, X₃ and X₅ are any amino         acid, or     -   X₅ is R, G, L, A, F or deleted, and X₁, X₂, X₃ and X₄ are any         amino acid, or     -   X₁ is R, G, L, A, F or deleted, X₂ is R, G, L, A, F or deleted,         and X₃, X₄ and X₅ are any amino acid, or     -   X₁ is R, G, L, A, F or deleted, X₃ is R, G, L, A or deleted, and         X₂, X₄ and X₅ are any amino acid, or     -   X₁ is R, G, L, A, F or deleted, X₄ is R, G, A, F or deleted, and         X₂, X₃ and X₅ are any amino acid, or     -   X₁ is R, G, L, A, F or deleted, X₅ is R, G, L, A, F or deleted,         and X₂, X₃ and X₄ are any amino acid, or     -   X₂ is R, G, L, A, F or deleted, X₃ is R, G, L, A or deleted, and         X₁, X₄ and X₅ are any amino acid, or     -   X₂ is R, G, L, A, F or deleted, X₄ is R, G, A, F or deleted, and         X₂, X₄ and X₅ are any amino acid, or     -   X₂ is R, G, L, A, F or deleted, X₅ is R, G, L, A, F or deleted,         and X₂, X₃ and X₄ are any amino acid, or     -   X₃ is R, G, L, A or deleted, X₄ is R, G, A, F or deleted, and         X₂, X₄ and X₅ are any amino acid, or     -   X₃ is R, G, L, A or deleted, X₅ is R, G, L, A, F or deleted, and         X₂, X₃ and X₄ are any amino acid, or     -   X₄ is R, G, A, F or deleted, X₅ is R, G, L, A, F or deleted and         X₂, X₄ and X₅ are any amino acid, or     -   X₁ is R, G, L, A, F or deleted, X₂ is R, G, L, A, F or deleted,         X₃ is R, G, L, A or deleted, and X₄ and X₅ are any amino acid,         or     -   X₁ is any amino acid different from E or deleted, X₂ is R, G, L,         A, F or deleted, X₄ is R, G, A, F or deleted, and X₃ and X₅ are         any amino acid, or     -   X₁ is R, G, L, A, F or deleted, X₂ is R, G, L, A, F or deleted,         X₅ is R, G, L, A, F or deleted and X₃ and X₄ are any amino acid,         or     -   X₁ is R, G, L, A, F or deleted, X₃ is R, G, L, A or deleted, X₄         is R, G, A, F or deleted, and X₂ and X₅ are any amino acid, or     -   X₁ is R, G, L, A, F or deleted, X₃ is R, G, L, A or deleted, X₅         is R, G, L, A, F or deleted, and X₂ and X₄ are any amino acid,         or     -   X₁ is R, G, L, A, F or deleted, X₄ is R, G, A, F or deleted, X₅         is R, G, L, A, F or deleted, and X₂ and X₃ are any amino acid,         or     -   X₂ is R, G, L, A, F or deleted, X₃ is R, G, L, A or deleted, X₄         is R, G, A, F or deleted, and X₁ and X₅ are any amino acid, or     -   X₂ is R, G, L, A, F or deleted, X₃ is R, G, L, A or deleted, X₅         is R, G, L, A, F or deleted, and X₁ and X₄ are any amino acid,         or     -   X₂ is R, G, L, A, F or deleted, X₄ is R, G, A, F or deleted, X₅         is R, G, L, A, F or deleted, and X₁ and X₃ are any amino acid,         or     -   X₃ is R, G, L, A or deleted, X₄ is R, G, A, F or deleted, X₅ is         R, G, L, A, F or deleted, and X₁ and X₂ are any amino acid, or     -   X₁ is R, G, L, A, F or deleted, X₂ is R, G, L, A, F or deleted,         X₃ is R, G, L, A or deleted, X₄ is R, G, A, F or deleted, and X₅         is any amino acid, or     -   X₁ is R, G, L, A, F or deleted, X₂ is R, G, L, A, F or deleted,         X₃ is R, G, L, A or deleted, X₅ is R, G, L, A, F or deleted, and         X₄ is any amino acid, or     -   X₁ is R, G, L, A, F or deleted, X₂ is R, G, L, A, F or deleted,         X₄ is R, G, A, F or deleted, X₅ is R, G, L, A, F or deleted, and         X₃ is any amino acid, or     -   X₁ is R, G, L, A, F or deleted, X₃ is R, G, L, A or deleted, X₄         is R, G, A, F or deleted, X₅ is R, G, L, A, F or deleted, and X₂         is any amino acid, or     -   X₂ is R, G, L, A, F or deleted, X₃ is R, G, L, A or deleted, X₄         is R, G, A, F or deleted, X₅ is R, G, L, A, F or deleted, and X₁         is any amino acid, or     -   X₁ is R, G, L, A, F or deleted, X₂ is R, G, L, A, F or deleted,         X₃ is R, G, L, A or deleted, X₄ is R, G, A, F or deleted and X₅         is R, G, L, A, F or deleted.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said mutated immunosuppressive domain contains the amino acid sequence SEQ ID NO: 1 or SEQ ID NO: 3, wherein:

-   -   X₁ is A, G or R, and X₂, X₃, X₄ and X₅ are any amino acid, or     -   X₂ is A, G or R, and X₁, X₃, X₄ and X₅ are any amino acid, or     -   X₃ is A, G or R, and X₁, X₂, X₄ and X₅ are any amino acid, or     -   X₄ is A, G or R, and X₁, X₂, X₃ and X₅ are any amino acid, or     -   X₅ is A, G or R, and X₁, X₂, X₃ and X₄ are any amino acid, in         particular:     -   X₁ is R, and X₂, X₃, X₄ and X₅ are any amino acid, or     -   X₂ is R, and X₁, X₃, X₄ and X₅ are any amino acid, or     -   X₃ is R, and X₁, X₂, X₄ and X₅ are any amino acid, or     -   X₄ is R, and X₁, X₂, X₃ and X₅ are any amino acid, or     -   X₅ is R, and X₁, X₂, X₃ and X₄ are any amino acid.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein:

-   -   X₁ is R, G, L, A, F or deleted, and/or     -   X₂ is G, L, F or deleted, and/or     -   X₃ is R, G, L, A, or deleted, and/or     -   X₄ is R, G, A, F or deleted, and/or     -   X₅ is G, L, F or deleted.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein:

-   -   X₃ is A, G, L, R, C, D, E, H, K, M, N, Q, S, T, V, W, Y or         deleted, X₄ is C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y,         and X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H, I, K, M, N, P, Q,         S, T, V, W or Y, or     -   X₄ is A, F, G, R, C, D, E, H, K, M, N, P, Q, S, T, W, Y or         deleted, X₃ is F, C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y,         and X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H, I, K, M, N, P, Q,         S, T, V, W or Y, or     -   X₃ is A, G, L, R, C, D, E, H, K, M, N, Q, S, T, V, W, Y or         deleted, X₄ is A, F, G, R, C, D, E, H, K, M, N, P, Q, S, T, W, Y         or deleted, and X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H, I, K,         M, N, P, Q, 5, T, V, W or Y.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein:

-   -   X₃ is R, G, L, A or deleted, X₄ is L, C, D, E, H, I, K, M, N, P,         Q, S, T, V, W or Y, and X₁, X₂, X₅ are A, F, G, L, R, C, D, E,         H, I, K, M, N, P, Q, S, T, V, W or Y, or     -   X₄ is R, G, L, A, F or deleted, X₃ is F, C, D, E, H, I, K, M, N,         P, Q, S, T, V, W or Y, and X₁, X₂, X₅ are A, F, G, L, R, C, D,         E, H, I, K, M, N, P, Q, S, T, V, W or Y, or     -   X₃ is R, G, L, A or deleted, X₄ is R, G, A, F or deleted, and         X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H, I, K, M, N, P, Q, 5,         T, V, W or Y.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein:

-   -   X₃ is R, A or deleted, X₄ is L, C, D, E, H, I, K, M, N, P, Q, S,         T, V, W or Y, and X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H, I,         K, M, N, P, Q, S, T, V, W or Y, or     -   X₄ is R, A or deleted, X₃ is F, C, D, E, H, I, K, M, N, P, Q, S,         T, V, W or Y, and X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H, I,         K, M, N, P, Q, S, T, V, W or Y, or     -   X₃ is R, A or deleted, X₄ is R, A or deleted, and X₁, X₂, X₅ are         A, F, G, L, R, C, D, E, H, I, K, M, N, P, Q, 5, T, V, W or Y.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said mutated immunosuppressive domain contains the amino acid sequence SEQ ID NO: 1 or SEQ ID NO: 3, wherein:

-   -   X₁ is A, G or R, X₂ is A, G or R, and X₃, X₄ and X₅ are any         amino acid, or     -   X₁ is A, G or R, X₃ is A, G or R, and X₂, X₄ and X₅ are any         amino acid, or     -   X₁ is A, G or R, X₄ is A, G or R, and X₂, X₃ and X₅ are any         amino acid, or     -   X₁ is A, G or R, X₅ is A, G or R, and X₂, X₃ and X₄ are any         amino acid, or     -   X₂ is A, G or R, X₃ is A, G or R, and X₁, X₄ and X₅ are any         amino acid, or     -   X₂ is A, G or R, X₄ is A, G or R, and X₁, X₃ and X₅ are any         amino acid, or     -   X₂ is A, G or R, X₅ is A, G or R, and X₁, X₃ and X₄ are any         amino acid, or     -   X₃ is A, G or R, X₄ is A, G or R, and X₁, X₂ and X₅ are any         amino acid, or     -   X₃ is A, G or R, X₅ is A, G or R, and X₁, X₂ and X₄ are any         amino acid, or     -   X₄ is A, G or R, X₅ is A, G or R, and X₁, X₂ and X₃ are any         amino acid,         in particular:     -   X₁ is R, X₂ is R, and X₃, X₄ and X₅ are any amino acid, or     -   X₁ is R, X₃ is R, and X₂, X₄ and X₅ are any amino acid, or     -   X₁ is R, X₄ is R, and X₂, X₃ and X₅ are any amino acid, or     -   X₁ is R, X₅ is R, and X₂, X₃ and X₄ are any amino acid, or     -   X₂ is R, X₃ is R, and X₁, X₄ and X₅ are any amino acid, or     -   X₂ is R, X₄ is R, and X₁, X₃ and X₅ are any amino acid, or     -   X₂ is R, X₅ is R, and X₁, X₃ and X₄ are any amino acid, or     -   X₃ is R, X₄ is R, and X₁, X₂ and X₅ are any amino acid, or     -   X₃ is R, X₅ is R, and X₁, X₂ and X₄ are any amino acid, or     -   X₄ is R, X₅ is R, and X₁, X₂ and X₃ are any amino acid.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said mutated immunosuppressive domain contains the amino acid sequence SEQ ID NO: 1 or SEQ ID NO: 3, wherein: X₁ is A, G or R, and X₂, X₃, X₄ and X₅ are any amino acid different from A, G or R, or

-   -   X₂ is A, G or R, and X₁, X₃, X₄ and X₅ are any amino acid         different from A, G or R, or     -   X₃ is A, G or R, and X₁, X₂, X₄ and X₅ are any amino acid         different from A, G or R, or     -   X₄ is A, G or R, and X₁, X₂, X₃ and X₅ are any amino acid         different from A, G or R, or     -   X₅ is A, G or R, and X₁, X₂, X₃ and X₄ are any amino acid         different from A, G or R,         in particular:     -   X₁ is R, and X₂, X₃, X₄ and X₅ are any amino acid different from         A, G or R, or     -   X₂ is R, and X₁, X₃, X₄ and X₅ are any amino acid different from         A, G or R, or     -   X₃ is R, and X₁, X₂, X₄ and X₅ are any amino acid different from         A, G or R, or     -   X₄ is R, and X₁, X₂, X₃ and X₅ are any amino acid different from         A, G or R, or     -   X₅ is R, and X₁, X₂, X₃ and X₄ are any amino acid different from         A, G or R.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said mutated immunosuppressive domain contains the amino acid sequence SEQ ID NO: 1 or SEQ ID NO: 3, wherein:

-   -   X₁ is A, G or R, X₂ is A, G or R, and X₃, X₄ and X₅ are any         amino acid different from A, G or R, or     -   X₁ is A, G or R, X₃ is A, G or R, and X₂, X₄ and X₅ are any         amino acid different from A, G or R, or     -   X₁ is A, G or R, X₄ is A, G or R, and X₂, X₃ and X₅ are any         amino acid different from A, G or R, or     -   X₁ is A, G or R, X₅ is A, G or R, and X₂, X₃ and X₄ are any         amino acid different from A, G or R, or     -   X₂ is A, G or R, X₃ is A, G or R, and X₁, X₄ and X₅ are any         amino acid different from A, G or R, or     -   X₂ is A, G or R, X₄ is A, G or R, and X₁, X₃ and X₅ are any         amino acid different from A, G or R, or     -   X₂ is A, G or R, X₅ is A, G or R, and X₁, X₃ and X₄ are any         amino acid different from A, G or R, or     -   X₃ is A, G or R, X₄ is A, G or R, and X₁, X₂ and X₅ are any         amino acid different from A, G or R, or     -   X₃ is A, G or R, X₅ is A, G or R, and X₁, X₂ and X₄ are any         amino acid different from A, G or R, or     -   X₄ is A, G or R, X₅ is A, G or R, and X₁, X₂ and X₃ are any         amino acid different from A, G or R,         in particular:     -   X₁ is R, X₂ is R, and X₃, X₄ and X₅ are any amino acid different         from A, G or R, or     -   X₁ is R, X₃ is R, and X₂, X₄ and X₅ are any amino acid different         from A, G or R, or     -   X₁ is R, X₄ is R, and X₂, X₃ and X₅ are any amino acid different         from A, G or R, or     -   X₁ is R, X₅ is R, and X₂, X₃ and X₄ are any amino acid different         from A, G or R, or     -   X₂ is R, X₃ is R, and X₁, X₄ and X₅ are any amino acid different         from A, G or R, or     -   X₂ is R, X₄ is R, and X₁, X₃ and X₅ are any amino acid different         from A, G or R, or     -   X₂ is R, X₅ is R, and X₁, X₃ and X₄ are any amino acid different         from A, G or R, or     -   X₃ is R, X₄ is R, and X₁, X₂ and X₅ are any amino acid different         from A, G or R, or     -   X₃ is R, X₅ is R, and X₁, X₂ and X₄ are any amino acid,         different from A, G or R or     -   X₄ is R, X₅ is R, and X₁, X₂ and X₃ are any amino acid different         from A, G or R.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein:

-   -   X₃ is R, X₄ is L, C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y,         and X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H, I, K, M, N, P, Q,         S, T, V, W or Y, or     -   X₄ is R, X₃ is F, C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y,         and X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H, I, K, M, N, P, Q,         S, T, V, W or Y, or     -   X₃ is R, X₄ is R, and X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H,         I, K, M, N, P, Q, S, T, V, W or Y.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein:

-   -   X₃ is R, and X₁ is E, X₂ is K, X₄ is L, X₅ is Y, or     -   X₄ is R, and X₁ is E, X₂ is K, X₃ is F, X₅ is Y, or     -   X₃ is R, X₄ is R, and X₁ is E, X₂ is K, X₅ is Y.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein:

-   -   X₃ is R, and X₁, X₂, X₄, X₅ are A, F, G, L, R, C, D, E, H, I, K,         M, N, P, Q, S, T, V, W or Y.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein:

-   -   X₃ is R, and X₁ is E, X₂ is K, X₄ is L, X₅ is Y.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said mutated feline lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) contains the following amino acid sequence:

(SEQ ID NO: 489) A-[I/M/T/L]-[A/G/R]-K-[F/P]-[L/V/I]-Y-T-A, or (SEQ ID NO: 490) A-[I/M/T/L]-E-[A/G/R]-[F/P]-[L/V/I]-Y-T-A, or (SEQ ID NO: 491) A-[I/M/T/L]-E-K-[A/G/R]-[L/V/I]-Y-T-A, or (SEQ ID NO: 492) A-[I/M/T/L]-E-K-[F/P]-[A/G/R]-Y-T-A, or (SEQ ID NO: 493) A-[I/M/T/L]-E-K-[F/P]-[L/V/I]-[A/G/R]-T-A, or (SEQ ID NO: 494) A-[I/M/T/L]-E-K-[A/G/R]-[A/G/R]-Y-T-A, in particular:

(SEQ ID NO: 489) A-[I/M/T/L]-[A/G/R]-K-[F/P]-[L/V/I]-Y-T-A, or (SEQ ID NO: 495) A-[I/M/T/L]-E-G-[F/P]-[L/V/I]-Y-T-A, or (SEQ ID NO: 491) A-[I/M/T/L]-E-K-[A/G/R]-[L/V/I]-Y-T-A, or (SEQ ID NO: 492) A-[I/M/T/L]-E-K-[F/P]-[A/G/R]-Y-T-A, or (SEQ ID NO: 496) A-[I/M/T/L]-E-K-[F/P]-[L/V/I]-G-T-A, or (SEQ ID NO: 494) A-[I/M/T/L]-E-K-[A/G/R]-[A/G/R]-Y-T-A.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said mutated feline lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) contains the following amino acid sequence:

(SEQ ID NO: 497) A-[I/M/T/L]-R-K-[F/P]-[L/V/I]-Y-T-A, or (SEQ ID NO: 498) A-[I/M/T/L]-E-R-[F/P]-[L/V/I]-Y-T-A, or (SEQ ID NO: 499) A-[I/M/T/L]-E-K-R-[L/V/I]-Y-T-A, or (SEQ ID NO: 500) A-[I/M/T/L]-E-K-[F/P]-R-Y-T-A, or (SEQ ID NO: 501) A-[I/M/T/L]-E-K-[F/P]-[L/V/I]-R-T-A, or (SEQ ID NO: 502) A-[I/M/T/L]-E-K-R-R-Y-T-A.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said isolated mutated feline lentiviral ENV protein or said fragment thereof, comprises one of the amino acid sequences SEQ ID NO: 28 to 171.

In the invention “SEQ ID NO: 28 to 171” encompasses SEQ ID NO: 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170 and 171.

The correspondence is the following one:

SEQ ID NO: 28 AIEKRLYTA SEQ ID NO: 29 AMEKRLYTA SEQ ID NO: 30 ATEKRLYTA SEQ ID NO: 31 ALEKRLYTA SEQ ID NO: 32 AIEKRVYTA SEQ ID NO: 33 AMEKRVYTA SEQ ID NO: 34 ATEKRVYTA SEQ ID NO: 35 ALEKRVYTA SEQ ID NO: 36 AIEKRIYTA SEQ ID NO: 37 AMEKRIYTA SEQ ID NO: 38 ATEKRIYTA SEQ ID NO: 39 ALEKRIYTA SEQ ID NO: 40 AIEKGLYTA SEQ ID NO: 41 AMEKGLYTA SEQ ID NO: 42 ATEKGLYTA SEQ ID NO: 43 ALEKGLYTA SEQ ID NO: 44 AIEKGVYTA SEQ ID NO: 45 AMEKGVYTA SEQ ID NO: 46 ATEKGVYTA SEQ ID NO: 47 ALEKGVYTA SEQ ID NO: 48 AIEKGIYTA SEQ ID NO: 49 AMEKGIYTA SEQ ID NO: 50 ATEKGIYTA SEQ ID NO: 51 ALEKGIYTA SEQ ID NO: 52 AIEKLLYTA SEQ ID NO: 53 AMEKLLYTA SEQ ID NO: 54 ATEKLLYTA SEQ ID NO: 55 ALEKLLYTA SEQ ID NO: 56 AIEKLVYTA SEQ ID NO: 57 AMEKLVYTA SEQ ID NO: 58 ATEKLVYTA SEQ ID NO: 59 ALEKLVYTA SEQ ID NO: 60 AIEKLIYTA SEQ ID NO: 61 AMEKLIYTA SEQ ID NO: 62 ATEKLIYTA SEQ ID NO: 63 ALEKLIYTA SEQ ID NO: 64 AIEKALYTA SEQ ID NO: 65 AMEKALYTA SEQ ID NO: 66 ATEKALYTA SEQ ID NO: 67 ALEKALYTA SEQ ID NO: 68 AIEKAVYTA SEQ ID NO: 69 AMEKAVYTA SEQ ID NO: 70 ATEKAVYTA SEQ ID NO: 71 ALEKAVYTA SEQ ID NO: 72 AIEKLIYTA SEQ ID NO: 73 AMEKAIYTA SEQ ID NO: 74 ATEKAIYTA SEQ ID NO: 75 ALEKAIYTA SEQ ID NO: 76 AIEKFRYTA SEQ ID NO: 77 AMEKFRYTA SEQ ID NO: 78 ATEKFRYTA SEQ ID NO: 79 ALEKFRYTA SEQ ID NO: 80 AIEKPRYTA SEQ ID NO: 81 AMEKPRYTA SEQ ID NO: 82 ATEKPRYTA SEQ ID NO: 83 ALEKPRYTA SEQ ID NO: 84 AIEKFGYTA SEQ ID NO: 85 AMEKFGYTA SEQ ID NO: 86 ATEKFGYTA SEQ ID NO: 87 ALEKFGYTA SEQ ID NO: 88 AIEKPGYTA SEQ ID NO: 89 AMEKPGYTA SEQ ID NO: 90 ATEKPGYTA SEQ ID NO: 91 ALEKPGYTA SEQ ID NO: 92 AIEKFFYTA SEQ ID NO: 93 AMEKFFYTA SEQ ID NO: 94 ATEKFFYTA SEQ ID NO: 95 ALEKFFYTA SEQ ID NO: 96 AIEKPFYTA SEQ ID NO: 97 AMEKPFYTA SEQ ID NO: 98 ATEKPFYTA SEQ ID NO: 99 ALEKPFYTA SEQ ID NO: 100 AIEKFAYTA SEQ ID NO: 101 AMEKFAYTA SEQ ID NO: 102 ATEKFAYTA SEQ ID NO: 103 ALEKFAYTA SEQ ID NO: 104 AIEKPAYTA SEQ ID NO: 105 AMEKPAYTA SEQ ID NO: 106 ATEKPAYTA SEQ ID NO: 107 ALEKPAYTA SEQ ID NO: 108 AIEKRRYTA SEQ ID NO: 109 AMEKRRYTA SEQ ID NO: 110 ATEKRRYTA SEQ ID NO: 111 ALEKRRYTA SEQ ID NO: 112 AIEKRAYTA SEQ ID NO: 113 AMEKRAYTA SEQ ID NO: 114 ATEKRAYTA SEQ ID NO: 115 ALEKRAYTA SEQ ID NO: 116 AIEKRFYTA SEQ ID NO: 117 AMEKRFYTA SEQ ID NO: 118 ATEKRFYTA SEQ ID NO: 119 ALEKRFYTA SEQ ID NO: 120 AIEKRGYTA SEQ ID NO: 121 AMEKRGYTA SEQ ID NO: 122 ATEKRGYTA SEQ ID NO: 123 ALEKRGYTA SEQ ID NO: 124 AIEKARYTA SEQ ID NO: 125 AMEKARYTA SEQ ID NO: 126 ATEKARYTA SEQ ID NO: 127 ALEKARYTA SEQ ID NO: 128 AIEKAAYTA SEQ ID NO: 129 AMEKAAYTA SEQ ID NO: 130 ATEKAAYTA SEQ ID NO: 131 ALEKAAYTA SEQ ID NO: 132 AIEKAFYTA SEQ ID NO: 133 AMEKAFYTA SEQ ID NO: 134 ATEKAFYTA SEQ ID NO: 135 ALEKAFYTA SEQ ID NO: 136 AIEKAGYTA SEQ ID NO: 137 AMEKAGYTA SEQ ID NO: 138 ATEKAGYTA SEQ ID NO: 139 ALEKAGYTA SEQ ID NO: 140 AIEKGRYTA SEQ ID NO: 141 AMEKGRYTA SEQ ID NO: 142 ATEKGRYTA SEQ ID NO: 143 ALEKGRYTA SEQ ID NO: 144 AIEKGAYTA SEQ ID NO: 145 AMEKGAYTA SEQ ID NO: 146 ATEKGAYTA SEQ ID NO: 147 ALEKGAYTA SEQ ID NO: 148 AIEKGFYTA SEQ ID NO: 149 AMEKGFYTA SEQ ID NO: 150 ATEKGFYTA SEQ ID NO: 151 ALEKGFYTA SEQ ID NO: 152 AIEKGGYTA SEQ ID NO: 153 AMEKGGYTA SEQ ID NO: 154 ATEKGGYTA SEQ ID NO: 155 ALEKGGYTA SEQ ID NO: 156 AIEKFRYTA SEQ ID NO: 157 AMEKFRYTA SEQ ID NO: 158 ATEKFRYTA SEQ ID NO: 159 ALEKFRYTA SEQ ID NO: 160 AIEKFAYTA SEQ ID NO: 161 AMEKFAYTA SEQ ID NO: 162 ATEKFAYTA SEQ ID NO: 163 ALEKFAYTA SEQ ID NO: 164 AIEKFFYTA SEQ ID NO: 165 AMEKFFYTA SEQ ID NO: 166 ATEKFFYTA SEQ ID NO: 167 ALEKFFYTA SEQ ID NO: 168 AIEKFGYTA SEQ ID NO: 169 AMEKFGYTA SEQ ID NO: 170 ATEKFGYTA SEQ ID NO: 171 ALEKFGYTA

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said fragment of said isolated mutated feline lentiviral ENV protein comprises at least 40 amino acids, in particular at least 60 amino acids.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said isolated mutated feline lentiviral ENV protein or said fragment thereof, comprises one of the amino acid sequences SEQ ID NO: 172 to 315.

In the invention “SEQ ID NO: 172 to 315” encompasses SEQ ID NO: 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 256, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296, 297, 298, 299, 300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314 and 315.

The correspondence is the following one:

SEQ ID NO: 172 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKRLYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 173 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKRLY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 174 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKRLYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 175 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKRLYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 176 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKRVYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 177 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKRVY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 178 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKRVY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 179 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKRVY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 180 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKRIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 181 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKRIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 182 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKRIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 183 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKRIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 184 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKGLYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 185 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKGLY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 186 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKGLYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 187 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKGLYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 188 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKGVYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 189 AAIEKVTGALKINNLRLVTLEHQVLVIGLKVEMEKGVY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 190 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKGVY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 191 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKGVY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 192 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKGIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 193 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKGIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 194 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKGIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 195 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKGIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 196 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKLLYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 197 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKLLY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 198 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKLLYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 199 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKLLYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 200 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKLVYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 201 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKLVY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 202 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKLVYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 203 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKLVYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 204 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKLIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 205 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKLIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 206 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKLIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 207 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKLIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 208 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKALYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 209 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKALY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 210 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKALYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 211 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKALYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 212 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKAVYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 213 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKAVY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 214 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKAVY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 215 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKAVY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 216 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKAIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 217 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKAIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 218 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKAIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 219 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKAIYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 220 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKFRYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 221 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKFRY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 222 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKFRYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 223 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKFRYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 224 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKPRYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 225 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKPRY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 226 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKPRYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 227 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKPRYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 228 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKFGYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 229 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKFGY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 230 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKFGYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 231 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKFGYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 232 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKPGYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 233 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKPGY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 234 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKPGYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 235 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKPGYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 236 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKFFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 237 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKFFY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 238 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKFFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 239 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKFFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 240 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKPFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 241 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKPFY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 242 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKPFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 243 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKPFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 244 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKFAYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 245 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKFAY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 246 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKFAYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 247 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKFAYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 248 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKPAYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 249 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKPAY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 250 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKPAYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 251 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKPAYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 252 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKRRYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 253 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKRRY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 254 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKRRYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 255 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKRRYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 256 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKRAYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 257 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKRAY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 258 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKRAY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 259 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKRAY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 260 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKRFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 261 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKRFY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 262 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKRFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 263 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKRFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 264 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKRGYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 265 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKRGY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 266 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKRGY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 267 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKRGY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 268 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKARYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 269 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKARY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 270 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKARY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 271 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKARY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 272 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKAAYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 273 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKAAY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 274 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKAAY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 275 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKAAY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 276 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKAFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 277 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKAFY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 278 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKAFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 279 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKAFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 280 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKAGYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 281 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKAGY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 282 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKAGY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 283 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKAGY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 284 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKGRYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 285 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKGRY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 286 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKGRY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 287 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKGRY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 288 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKGAYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 289 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKGAY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 290 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKGAY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 291 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKGAY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 292 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKGFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 293 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKGFY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 294 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKGFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 295 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKGFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 296 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKGGYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 297 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKGGY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 298 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKGGY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 299 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKGGY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 300 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKFRYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 301 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKFRY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 302 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKFRYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 303 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKFRYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 304 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKFAYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 305 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKFAY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 306 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKFAYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 307 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKFAYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 308 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKFFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 309 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKFFY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 310 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKFFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 311 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKFFYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 312 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAIEKFGYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 313 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEAMEKFGY TAFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 314 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEATEKFGYT AFAMQELGCNQNQFFCKIPLELWTR SEQ ID NO: 315 AIEKVTGALKINNLRLVTLEHQVLVIGLKVEALEKFGYT AFAMQELGCNQNQFFCKIPLELWTR

As mentioned above, the previous ENV proteins having their ISU comprising the above sequence have decreased immunosuppressive properties, substantially no immunosuppressive properties or no immunosuppressive properties.

Thus, in other words, any feline lentiviral Env protein having in their ISU an amino acid sequence comprising the sequences SEQ ID NO: 28 to 315, have decreased immunosuppressive properties, substantially no immunosuppressive properties or no immunosuppressive properties.

In other words, a feline lentiviral ENV protein comprising, within its ISU domain, an amino acid sequence selected from SEQ ID NO: 28 to 315 have decreased immunosuppressive properties, substantially no immunosuppressive properties or no immunosuppressive properties.

In the invention, the fragments of the mutated ENV proteins according to the invention have decreased immunosuppressive properties, substantially no immunosuppressive properties or no immunosuppressive properties.

However, these fragments retain the structure and the antigenicity of the corresponding immunosuppressive domain that is not mutated, i.e. the wild type immunosuppressive domain.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein mutated feline lentiviral ENV protein or fragment thereof further comprises an additional mutation of one at least of the amino acids X₁*, X₂*,

X₃*, X₄* and X₅* in the following sequence:

(SEQ ID NO: 316) X₁*-X₂*-X₃*-X₄*-X₅*-[V/I]-[E/R]-A-[I/M/T/L]-X₁- X₂-X₃-X₄-X₅-T-A wherein

-   -   X₁, X₂, X₃, X₄, X₅ are defined as above, and     -   X₁* is either deleted, or is A, C, D, E, F, G, H, I, K, L, N, P,         Q, R, S, Y or W, in particular A, F, G, L or R, and/or     -   X₂* is either deleted, or is A, C, D, E, F, G, H, K, M, N, P, Q,         R, S, T, V, Y or W, in particular A, F, G, or R, and/or     -   X₃* is either deleted, or is A, C, D, E, F, L, H, I, K, M, N, P,         Q, R, S, T, V,

Y or W, in particular A, F, L or R, and/or

-   -   X₄* is either deleted, or is A, C, D, E, F, G, H, I, K, M, N, P,         Q, R, S, T, V, Y or W, in particular A, F, G, or R, and/or     -   X₅* is either deleted, or is A, C, D, E, F, G, L, H, I, M, N, P,         Q, S, V, Y or W, in particular A, F, G or L,         in association with a pharmaceutically acceptable carrier.

In such a pharmaceutical composition, the mutated feline lentiviral ENV protein, or fragment thereof, comprises a mutation of one at least of the amino acids X₁, X₂, X₃, X₄ and X₅ in association with an additional mutation of one at least of the amino acids X₁*, X₂*, X₃*, X₄*and X₅*.

In the invention, “a mutation of one at least of the amino acids X₁*, X₂*, X₃*, X₄* and X₅*” means that said mutated acids are:

-   -   X₁* or X₂* or X₃* or X₄* or X₅* or     -   X₁*/X₂* or X₁*/X₃* or X₁*/X₄* or X₁*/X₅* or X₂*/X₃* or X₂*/X₄*         or X₂*/X₅* or X₃*/X₄* or X₃*/X₅* or X₄*/X₅* or     -   X₁*/X₂*/X₃* or X₁*/X₂*/X₄* or X₁*/X₂*/X₅* or X₁*/X₃*/X₄* or         X₁*/X₃*/X₅* or     -   X₁*/X₄*/X₅* or X₂*/X₃*/X₄* or X₂*/X₃*/X₅* or X₂*/X₄*/X₅* or         X₃*/X₄*/X₅* or     -   X₁*/X₂*/X₃*/X₄* or X₁*/X₂*/X₃*/X₅* or X₁*/X₂*/X₄*/X₅* or         X₁*/X₃*/X₄*/X₅* or X₂*/X₃*/X₄*/X₅* or     -   X₁*/X₂*/X₃*/X₄*/X₅*.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein mutated feline lentiviral ENV protein or fragment thereof further comprises an additional mutation of the amino acids X₃* in the following sequence:

(SEQ ID NO: 434) [T/V/M]-[L/I]-X₃*-L-[K/T/R]-[V/I]-[E/R]-A- [I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A wherein

-   -   X₁, X₂, X₃, X₄, X₅ are defined as above, and     -   X₃* is either deleted, or is A, C, D, E, F, L, H, I, K, M, N, P,         Q, R, S, T, V, Y or W, in particular A, F, L or R,         in association with a pharmaceutically acceptable carrier.

In such a pharmaceutical composition, the mutated feline lentiviral ENV protein, or fragment thereof, comprises a mutation of one at least of the amino acids X₁, X₂, X₃, X₄ and X₅ in association with an additional mutation of X₃*.

The sequences SEQ ID NO: 316 and SEQ ID NO: 434 contain the following amino acid sequence A[I/M/T/L]X₁X₂X₃X₄X₅TA (SEQ ID NO: 1) elongated on its N-terminal end, in which an additional mutation is present.

In another aspect, the invention relates to a pharmaceutical composition comprising as active substance an isolated mutated feline lentiviral ENV protein having substantially no immunosuppressive activity, or a fragment thereof,

said mutated feline lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type feline lentiviral ENV protein,

said mutated feline lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 467) X₁*X₂*-X₃*-X₄*-X₅*-[V/I]-[E/R]-A-[I/M/T/L]-E-K- [F/P]-[L/V/I]-Y-T-A  wherein

-   -   X₁* is either deleted, or is A, C, D, E, F, G, H, I, K, L, N, P,         Q, R, S, T V Y or W, in particular A, F, G, L or R, and/or     -   X₂* is either deleted, or is A, C, D, E, F, G, H, K, M, N, P, Q,         R, S, T, V, Y or W, in particular A, F, G or R, and/or     -   X₃* is either deleted, or is A, C, D, E, F, L, H, I, K, M, N, P,         Q, R, S, T, V, Y or W, in particular A, F, L or R, and/or     -   X₄* is either deleted, or is A, C, D, E, F, G, H, I, K, M, N, P,         Q, R, S, T, V, Y or W, in particular A, F, G, or R, and/or     -   X₅* is either deleted, or is A, C, D, E, F, G, L, H, I, M, N, P,         Q, S, V, Y or W, in particular A, F, G, or L.         in association with a pharmaceutically acceptable carrier.

In another aspect, the invention relates to a pharmaceutical composition comprising as active substance an isolated mutated feline lentiviral ENV protein having substantially no immunosuppressive activity, or a fragment thereof,

said mutated feline lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type feline lentiviral ENV protein,

said mutated feline lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 468) [T/V/M]-[L/I]-X₃*-L-[K/T/R]-[V/I]-[E/R]-A- [I/M/T/L]-E-K-[F/P]-[L/V/I]-Y-T-A wherein

-   -   X₃* is either deleted, or is A, C, D, E, F, L, H, I, K, M, N, P,         Q, R, S, T, V, Y or W, in particular A, F, L or R,         in association with a pharmaceutically acceptable carrier.

In another advantageous embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said mutated feline lentiviral protein, said variant or said fragment harbour a three-dimensional structure similar to the structure of the natural non mutated feline lentiviral ENV protein, non mutated variant or non fragment thereof.

The skilled person knows how to measure the antigenicity, by using standard proceedings.

In another advantageous embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said mutated feline lentiviral protein or said fragment thereof are expressed at the plasma membrane at a level substantially identical to the expression at the plasma membrane of the natural non mutated lentiviral ENV protein or non mutated fragment thereof.

The membrane expression of the lentiviral ENV protein according to the invention can be measured by any techniques allowing determination of a plasma membrane protein. For instance, cells can be transfected with an expression vector allowing the expression of the mutated lentiviral ENV protein according to the invention. Cells are then incubated with an antibody recognizing specifically the extracellular part of said lentiviral mutated ENV protein. The complex (antibody/ENV protein) is detected by another antibody, and the complex can be quantified by flow cytometry (see examples).

If no complex is detected, the mutated ENV protein is not expressed at the plasma membrane. On the contrary, if the complex is detected, this means that the mutated ENV protein is expressed at the plasma membrane and in an appropriate conformation so as to be detected by the antibody recognizing the extracellular part of the protein.

In another advantageous embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said mutated feline lentiviral ENV protein is such that it has conserved, totally or partially, its fusogenic activity, which is responsible for virus-cell or cell-cell membrane fusion and can be measured by appropriate assays.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said isolated mutated feline lentiviral ENV protein consists of one of the amino acid sequences: SEQ ID NO: 5 and SEQ ID NO: 317 to 342 and 374 to 419.

SEQ ID NO: 317 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKGLYTAFAMQELGCNQNQFFC KIPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQK FYEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYL KGLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIA MPEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 318 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKLLYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 319 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAPP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKALYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 320 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKFRYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 321 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKFGYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 322 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKFAYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 323 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKFFYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 324 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMRKFLYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 325 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMGKFLYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 326 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMLKFLYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 327 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMAKFLYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 328 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMFKFLYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 329 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMERFLYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 330 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEGFLYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 331 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMELFLYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 332 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEAFLYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 333 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEFFLYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 334 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKFLRTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 335 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKFLGTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 336 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKFLLTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 337 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKFLATAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 338 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKFLFTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 339 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKRRYTAFAMQELGCNQNQFFC KIPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQK FYEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYL KGLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIA MPEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 340 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKRGYTAFAMQELGCNQNQFFC KIPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQK FYEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYL KGLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIA MPEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 341 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKRAYTAFAMQELGCNQNQFFC KIPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQK FYEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYL KGLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIA MPEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 342 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDERVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFTGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP EEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQ RNRWEWRPDFKSKKVKISLPCNSTKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSNLHTEARFRIRCRWNVGSDTSLIDT CGNTPNVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDL IVHFNMTKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTN SSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVV KQPDYLLVPEEVMEYKPRRKRAAIHVMLALATVLSIAGA GTGATAIGMVTQYHQVLATHQEAIEKVTGALKINNLRLV TLEHQVLVIGLKVEAMEKRFYTAFAMQELGCNQNQFFCK IPLELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKF YEIIMDIEQNNVQGKTGIQQLQKWEDWVRWIGNIPQYLK GLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAM PEVEGEEIQPQMELRRNGRQCGMSEKEE SEQ ID NO: 374 MAEGFAANRQWIGLEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDESVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFIGIIIYSQTTNAQVVWRLPPLVVPVEESEIIFWDCWAPEE PACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATLFK KATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIVPD YQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLSYC TDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWNQM AYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQRN RWEWRPDFESKKVKISLQCNSTKNLTFAMRSSGDYGEVT GAWIEFGCHRNKSKLHAEARFRIRCRWNVGSNTSLIDTCG NTQKVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDLIM HFNMKKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTNSS SSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVVKQ PDYLVVPEEVMEYKPRRKRAAIHVMLALAAVLSIAGAGT GATAIGMVTQYHQVLATHQEAVEKVTEALKINNLRLVTL EHQVLVIGLKVEAMEKRLYTAFAMQELGCNQNQFFCKIP PELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKFYE IIMDIEQNNVQGKKGIQQLQKWEDWVGWIGNIPQYLKGL LGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAMPE VEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 375 MAEGFAANRQWIGLEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRNEIQEVKLEEGN AGKFRRARFLRYSDESVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEECYNNREKGTTDNIKYGRRCCLGTVTLYLI LFIGIIIYSQTTNAQVVWRLPPLVVPVEESEIIFWDCWAPEE PACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATLFK KATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIVPD YQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLSYC TDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWNQM AYYNSCKWEEAKVKFHCQRTQSQPGSWFRAISSWKQRN RWEWRPDFESKKVKISLQCNSTKNLTFAMRSSGDYGEVT GAWIEFGCHRNKSKLHAEARFRIRCRWNVGSNTSLIDTCG NTQKVSGANPVDCTMYSNKMYNCSLQNGFTMKVDDLIM HFNMKKAVEMYNIAGNWSCTSDLPSSWGYMNCNCTNSS SSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQVVKQ PDYLVVPEEVMEYKPRRKRAAIHVMLALAAVLSIAGAGT GATAIGMVTQYHQVLATHQEAVEKVTEALKINNLRLVTL EHQVLVIGLKVEAMEKFRYTAFAMQELGCNQNQFFCKIP PELWTRYNMTINQTIWNHGNITLGEWYNQTKDLQQKFYE IIMDIEQNNVQGKKGIQQLQKWEDWVGWIGNIPQYLKGL LGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAMPE VEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 376 MAEGFVANGQWIGPEEAEELVDFEIATQMNEEGPLNPGIN PFRVPGITKQEKQEYCSTMQPKLQALRNEIQEVKLEEGNA GKFRRARFLRYSDETILSLIYLFIGYFRYLVDRKRFGSLRH DIDIEAPQEECYNNKEKGMTENIKYGKRCLVGTAALYLIL AIGIIIIIRTTDAQVVWRLPPLVVPVEESEIIFWDCWAPEEPA CQDFLGAMIHLKASTNISNTEGPTLGNWAREIWATLFKKA TRQCRRGRIWKRWNETITGPIGCANNTCYNISVIVPDYQC YIDRVDTWLQGKVNISLCLTGGKMLYNKETKQLSYCTDP LQIPLINYTFGPNQTCMWNISQIQDPEIPKCGWWNQQAYY NNCKWERTDVKFQCQRTQSQPGSWIRAISSWKQGNRWE WRPDFESERVKVSLQCNSTRNLTFAMRSSGDYGEITGAWI EFGCHRNKSIRHNAARFRIRCRWNEGDNNSLIDTCGETQN VSGANPVDCTMYANKMYNCSLQDGFTMKVDDLIMHFN MTKAVEMYNIAGNWSCMSDLPTEWGYMNCNCTNDTSN NNTRKMKCPKENGILRNWYNPVAGLRQSLEKYQVVKQP DYLLVPEEVMEYKPRRKRAAIHVMLALATVLSMAGAGT GATAIGMVTQYHQVLATQQEAIEKVTEALKITNLRLVTLE HQVLVIGLKVEAMEKRLYTAFAMQELGCNQNQFFCKVPP ELWRRYNMTINQTIWNHGNITLGEWYNQTKDLQKKFYGI IMDIEQNNVQGKKGLQQLQKWEDWVGWIGNIPQYLKGL LGSIVGIGLGILLLILCLPTLVDCIRNCIHKILGYTVIAMPEV DGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 377 MAEGFVANGQWIGPEEAEELVDFEIATQMNEEGPLNPGIN PFRVPGITKQEKQEYCSTMQPKLQALRNEIQEVKLEEGNA GKFRRARFLRYSDETILSLIYLFIGYFRYLVDRKRFGSLRH DIDIEAPQEECYNNKEKGMTENIKYGKRCLVGTAALYLIL AIGIIIIIRTTDAQVVWRLPPLVVPVEESEIIFWDCWAPEEPA CQDFLGAMIHLKASTNISNTEGPTLGNWAREIWATLFKKA TRQCRRGRIWKRWNETITGPIGCANNTCYNISVIVPDYQC YIDRVDTWLQGKVNISLCLTGGKMLYNKETKQLSYCTDP LQIPLINYTFGPNQTCMWNISQIQDPEIPKCGWWNQQAYY NNCKWERTDVKFQCQRTQSQPGSWIRAISSWKQGNRWE WRPDFESERVKVSLQCNSTRNLTFAMRSSGDYGEITGAWI EFGCHRNKSIRHNAARFRIRCRWNEGDNNSLIDTCGETQN VSGANPVDCTMYANKMYNCSLQDGFTMKVDDLIMHFN MTKAVEMYNIAGNWSCMSDLPTEWGYMNCNCTNDTSN NNTRKMKCPKENGILRNWYNPVAGLRQSLEKYQVVKQP DYLLVPEEVMEYKPRRKRAAIHVMLALATVLSMAGAGT GATAIGMVTQYHQVLATQQEAIEKVTEALKITNLRLVTLE HQVLVIGLKVEAMEKFRYTAFAMQELGCNQNQFFCKVPP ELWRRYNMTINQTIWNHGNITLGEWYNQTKDLQKKFYGI IMDIEQNNVQGKKGLQQLQKWEDWVGWIGNIPQYLKGL LGSIVGIGLGILLLILCLPTLVDCIRNCIHKILGYTVIAMPEV DGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 378 MAEGFVANGQWIGPEEAEELLDFDIATQLNEEGPLNPGIN PFRVPGITQKEKQEYCNTLQPKLQALRNEIQEVKLEERNA GKFRRARFLRYSDETILSLIYSFVGYFRYLVDRKKFGSLRH DIDIEAPQEEYYNNKEKGMTDNVKYGKRCLVGTAAFYLL LAIGIIIIIRTVDAQVVWRLPPLVVPVEESEIIFWDCWAPEEP ACQDFLGAMIHLKASTNIRIQEGPTLGNWAREIWATLFKK ATRQCRRGRIWKRWNETITGPIGCANNTCYNISVIIPDYQC YIDRVDTWLQGKVNISICLTGGKMLYNKETKQLSYCTDP LQIPLINYTFGPQQTCMWNTSQIQDPEIPKCGWWNQKAY YNQCSWEQTDVKFQCQRTQSQPGSWIRAISSWRQRNRWE WRPDFESERVKVSLQCNSTQNLTFAMRSSGDYGEITGAWI EFGCHRNKSKHHNEARFRIRCRWNEGNNNSLIDTCGKTQ NVLGANPVDCTMYANRMYNCSLQDGFTMKVDDLIMHF NMTKAVEMYNIAGNWSCMSDLPTNWGYMKCNCTNDTS NNHTIKMECPEEKGILRNWYNPVAGLRQSLEKYQVVKQP DYLVVPGEVMEYKPRRKRAAIHVMLALATVLSMAGAGT GATAIGMVTQYHQVLATHQEAIEKVTEALKINNLRLVTLE HQVLVIGLKVEAIEKRLYTAFAMQELGCNQNQFFCKVPL ELWRRYNMTINQTIWNHGNITLGEWYNQTKALQHKFYEI IMDIEQNNVQGKKGLQQLQKWEDWVGWIGNIPQYLKGL LGGILGIGLGILLLILCLPTLVDCIRNCIHKILGYTVIAMPDV DEEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 379 MAEGFVANGQWIGPEEAEELLDFDIATQLNEEGPLNPGIN PFRVPGITQKEKQEYCNTLQPKLQALRNEIQEVKLEERNA GKFRRARFLRYSDETILSLIYSFVGYFRYLVDRKKFGSLRH DIDIEAPQEEYYNNKEKGMTDNVKYGKRCLVGTAAFYLL LAIGIIIIIRTVDAQVVWRLPPLVVPVEESEIIFWDCWAPEEP ACQDFLGAMIHLKASTNIRIQEGPTLGNWAREIWATLFKK ATRQCRRGRIWKRWNETITGPIGCANNTCYNISVIIPDYQC YIDRVDTWLQGKVNISICLTGGKMLYNKETKQLSYCTDP LQIPLINYTFGPQQTCMWNTSQIQDPEIPKCGWWNQKAY YNQCSWEQTDVKFQCQRTQSQPGSWIRAISSWRQRNRWE WRPDFESERVKVSLQCNSTQNLTFAMRSSGDYGEITGAWI EFGCHRNKSKHHNEARFRIRCRWNEGNNNSLIDTCGKTQ NVLGANPVDCTMYANRMYNCSLQDGFTMKVDDLIMHF NMTKAVEMYNIAGNWSCMSDLPTNWGYMKCNCTNDTS NNHTIKMECPEEKGILRNWYNPVAGLRQSLEKYQVVKQP DYLVVPGEVMEYKPRRKRAAIHVMLALATVLSMAGAGT GATAIGMVTQYHQVLATHQEAIEKVTEALKINNLRLVTLE HQVLVIGLKVEAIEKFRYTAFAMQELGCNQNQFFCKVPL ELWRRYNMTINQTIWNHGNITLGEWYNQTKALQHKFYEI IMDIEQNNVQGKKGLQQLQKWEDWVGWIGNIPQYLKGL LGGILGIGLGILLLILCLPTLVDCIRNCIHKILGYTVIAMPDV DEEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 380 MAEGFAANRQWIGPEEAEELLDFDIAIQMNEEGPLNPGVN PFRVPGITEAEKQEYCNILQPKLQDLKGKIQEVKLEEGNA GKFRRARFLRYSDETVLSLIHLFIGYCPHLCRRHELGSLRH DIDIEALQEERYNDREKGITDNIKYGKRCLIGTAVLYLLLS LGIIIHTCKAQVVWRLPPLVVPVEESEIIFWDCWAPEEPAC QDFLGAMIHLKASTNISIQEGPTLGNWAREIWGTLFKKAT RQCRRGRIWRRWNETITGPLGCANNTCYNISVIVPDYQCY LDRVDTWLQGKVNISLCLTGGKMLYNKETKQLSYCTDPL QIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWNQNAYY NSCRWEHTDVQFQCQRTQSQPGSWIRAISSWKQRNRWE WRPDFESEKVKVSLQCNSTKNLTFAMRSSGDYGEVTGA WIEFGCHRTKSKYHTEARFRIRCRWNVGDNTSLIDTCGET QNVSRANPVDCTMYANRMYNCSLQNGFTMKVDDLIMHF NKTKAVEMYNIAGNWSCKSDLPPTWGYMNCNCTNSTNS GTGIRMACPRNQGILRNWYNPVAGLRQSLEKYQVVKQPD YLVVPGEVMEYKPRRKRAAIHVMLALATVLSMAGAGTG ATAIGMVTQYQQVLATHQEAIEKVTEALKINNLRLVTLEH QVLVIGLKVEAMEKRLYTAFAMQELGCNQNQFFCKVPSA LWERYNMTINQTIWNHGNITLGEWYNQTKDLQQRFYEII MDIEQNNVQGKKGLQQLQEWEDWVGWIGNIPQYLKGLL GGILGIGLGMLLLILCLPTLVDCIRNCIHKILGYTVIAMPEV EEEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 381 MAEGFAANRQWIGPEEAEELLDFDIAIQMNEEGPLNPGVN PFRVPGITEAEKQEYCNILQPKLQDLKGKIQEVKLEEGNA GKFRRARFLRYSDETVLSLIHLFIGYCPHLCRRHELGSLRH DIDIEALQEERYNDREKGITDNIKYGKRCLIGTAVLYLLLS LGIIIHTCKAQVVWRLPPLVVPVEESEIIFWDCWAPEEPAC QDFLGAMIHLKASTNISIQEGPTLGNWAREIWGTLFKKAT RQCRRGRIWRRWNETITGPLGCANNTCYNISVIVPDYQCY LDRVDTWLQGKVNISLCLTGGKMLYNKETKQLSYCTDPL QIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWNQNAYY NSCRWEHTDVQFQCQRTQSQPGSWIRAISSWKQRNRWE WRPDFESEKVKVSLQCNSTKNLTFAMRSSGDYGEVTGA WIEFGCHRTKSKYHTEARFRIRCRWNVGDNTSLIDTCGET QNVSRANPVDCTMYANRMYNCSLQNGFTMKVDDLIMHF NKTKAVEMYNIAGNWSCKSDLPPTWGYMNCNCTNSTNS GTGIRMACPRNQGILRNWYNPVAGLRQSLEKYQVVKQPD YLVVPGEVMEYKPRRKRAAIHVMLALATVLSMAGAGTG ATAIGMVTQYQQVLATHQEAIEKVTEALKINNLRLVTLEH QVLVIGLKVEAMEKFRYTAFAMQELGCNQNQFFCKVPSA LWERYNMTINQTIWNHGNITLGEWYNQTKDLQQRFYEII MDIEQNNVQGKKGLQQLQEWEDWVGWIGNIPQYLKGLL GGILGIGLGMLLLILCLPTLVDCIRNCIHKILGYTVIAMPEV EEEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 382 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRDEIQEVKLEEGN AGKFRRTRFLRYSDEHVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEEYYNNREKGTTDNIKYGRRCCLGTVTLYL ILFIGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP DEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNRCKWEEAKVKFHCQRTQSQPGSWRRAISSWKQ RNRWEWRPDLESEKVKISLQCNSKKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSKHHSEARFRIRCRWNVGSNTSLIDT CGNTQDVSGANPVDCTMYSNKMYNCSLQNGFTMKVDD LIVHFSMTKAVKMYNIAGNWSCTSDLPSSWGYMNCNCT NSSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQV VKQPDYLVVPEEVMEYKPRRKRAAIHVMLALATVLSIAG AGTGATAIGMVTQYHQVLATHQEAIEKVTEALKINNLRL VTLEHQVLVIGLKVEAMEKRLYTAFAMQELGCNQNQFFC KIPPGLWTRYNMTINQTIWNHGNITLGEWYNKTKDLQQK FYEIIMDIEQNNVQGKTGIQQLQKWEDWVGWIGNIPQYL KGLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIA MPEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 383 MAEGFAANRQWIGPEEAEELLDFDIATQMSEEGPLNPGV NPFRVPGITEKEKQNYCNILQPKLQDLRDEIQEVKLEEGN AGKFRRTRFLRYSDEHVLSLVHAFIGYCIYLGNRNKLGSL RHDIDIEAPQEEYYNNREKGTTDNIKYGRRCCLGTVTLYL ILFIGVIVYSQTAGAQVVWRLPPLVVPVEESEIIFWDCWAP DEPACQDFLGAMIHLKAKTNISIREGPTLGNWAREIWATL FKKATRQCRRGRIWKRWNETITGPSGCANNTCYNVSVIV PDYQCYLDRVDTWLQGKINISLCLTGGKMLYNKVTKQLS YCTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWN QMAYYNRCKWEEAKVKFHCQRTQSQPGSWRRAISSWKQ RNRWEWRPDLESEKVKISLQCNSKKNLTFAMRSSGDYGE VTGAWIEFGCHRNKSKHHSEARFRIRCRWNVGSNTSLIDT CGNTQDVSGANPVDCTMYSNKMYNCSLQNGFTMKVDD LIVHFSMTKAVKMYNIAGNWSCTSDLPSSWGYMNCNCT NSSSSYSGTKMACPSNRGILRNWYNPVAGLRQSLEQYQV VKQPDYLVVPEEVMEYKPRRKRAAIHVMLALATVLSIAG AGTGATAIGMVTQYHQVLATHQEAIEKVTEALKINNLRL VTLEHQVLVIGLKVEAMEKFRYTAFAMQELGCNQNQFFC KIPPGLWTRYNMTINQTIWNHGNITLGEWYNKTKDLQQK FYEIIMDIEQNNVQGKTGIQQLQKWEDWVGWIGNIPQYL KGLLGGILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIA MPEVEGEEIQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 384 MAKGFAANRQWIGPEEAEELLDFDIATQMNEEGPLNPGV NPFRVPGITEQEKQDYCNILQPKLQELRNEIQEVKLEEGNA GKFRRARFLRYSDETILSLIHLFIGYCTYLCKRNELGSLRH DIDIEAPQEECYNNKEKGTTNNIKYGGRCFIGTMIMYLLIFI GIIIYIQTTEAQVVWRLPPLIVPVKESEIIFWDCWAPEEPAC QDFLGAMIHLKASTNISIQEGPTLGNWAREIWGTLFKKAT RQCRRGRIWKRWNETITGPLGCANNTCYNISVIVPDYQCY LDRVDTWLQGKVNISLCLTGGKMLYNKDTKQLSYCTDPL QIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWNQIAYYN SCKWEKTDVKFHCQRTQSQPGSWIRAISSWRQRNRWEW RPDFESEKVKVSLQCNSTKNLTFAMRSSGDYGEVTGAWI EFGCHRKKSKLHTEARFRIRCRWNVGNNASLIDTCGNTPD VSGANPVNCTMYANKMYNCWLQNGFTIKVDDLIMHFN MTKAVEMYNIAGNWSCTSDLPPTWGYMKCNCTNNSDDT RGKMACPRTQGILRNWYNPVAGLRQSLEKYQVVKQPDY LVVPGEVMEYKPRRKRAAIHVMLALATVLSMAGAGTGA TAIGMVTQYHQVLATHQEAIEKVTEALKINNLRLVTLEHQ VLVIGLKVEAMEKRLYTAFAMQELGCNQNQFFCKVPPQL WKRYNMTINQTIWNHGNITLGEWYNQTKDLQQKFYEIIM DIEQNNVQGKTGIQQLQRWEDWVGWIGNIPQYLKGLLGG ILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAMPEVEEE EIQQQMELRRNGRQCGMSEKEEE SEQ ID NO: 385 MAKGFAANRQWIGPEEAEELLDFDIATQMNEEGPLNPGV NPFRVPGITEQEKQDYCNILQPKLQELRNEIQEVKLEEGNA GKFRRARFLRYSDETILSLIHLFIGYCTYLCKRNELGSLRH DIDIEAPQEECYNNKEKGTTNNIKYGGRCFIGTMIMYLLIFI GIIIYIQTTEAQVVWRLPPLIVPVKESEIIFWDCWAPEEPAC QDFLGAMIHLKASTNISIQEGPTLGNWAREIWGTLFKKAT RQCRRGRIWKRWNETITGPLGCANNTCYNISVIVPDYQCY LDRVDTWLQGKVNISLCLTGGKMLYNKDTKQLSYCTDPL QIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWNQIAYYN SCKWEKTDVKFHCQRTQSQPGSWIRAISSWRQRNRWEW RPDFESEKVKVSLQCNSTKNLTFAMRSSGDYGEVTGAWI EFGCHRKKSKLHTEARFRIRCRWNVGNNASLIDTCGNTPD VSGANPVNCTMYANKMYNCWLQNGFTIKVDDLIMHFN MTKAVEMYNIAGNWSCTSDLPPTWGYMKCNCTNNSDDT RGKMACPRTQGILRNWYNPVAGLRQSLEKYQVVKQPDY LVVPGEVMEYKPRRKRAAIHVMLALATVLSMAGAGTGA TAIGMVTQYHQVLATHQEAIEKVTEALKINNLRLVTLEHQ VLVIGLKVEAMEKFRYTAFAMQELGCNQNQFFCKVPPQL WKRYNMTINQTIWNHGNITLGEWYNQTKDLQQKFYEIIM DIEQNNVQGKTGIQQLQRWEDWVGWIGNIPQYLKGLLGG ILGIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAMPEVEEE EIQQQMELRRNGRQCGMSEKEEE SEQ ID NO: 386 MAEGFAANRQWIGPEEAEELLDFDIATQMNEEGPLNPGIN PFRVPGITEIEKQAYCKILQPRLQALRNEIQEVKLEEGNAG KFRRARFLRYSDVAILSLIHVFIGYCTYLCNQQKLGSLRHD IDIEAPQEEYYSNNEKGTTDNIKYGRRCVIGTVALYLLICT GIIIYTRTATAQVVWRLPPLVVPVEESEVIFWDCWAPEEPA CQDFLGAMIHLKASTNISIQEGPTLGNWAREIWGTLFKKA TRQCRRGRIWRRWNETITGPLGCANNTCYNISVIVPDYQC YLDRVDTWLQGKINISLCLTGGKMLYNRYTKQLSYCTDP LQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWNQRAY YNSCRWESTDVKFHCQRTQSQPGSWLRAISSWRQRNRW EWRPDFESEKVKVSLQCNSTKNLTFAMRSSGDYGDVTGA WIEFGCHRNKSRLHTEARFRIRCRWNVGDNTSLIDTCGKT QNIAGANPVDCTMYVNRMYNCSLQNGFTMKVDDLIMHF NMTKAVEMYNIAGNWSCTSNLPPTWGYINCNCTNSSDSN KMACPSSQGILRNWYNPVAGLRQSLEKYQVVKQPDYLV VPGEVMEYKPRRKRAAIHVMLALATILSMAGAGTGATAI GMVTQYHQVLATHQEAIEKVTEALKVNNLRLITLEHQVL VIGLKVEAMEKRLYTAFAMQELGCNQNQFFCKVPPELW KRYNMTINQTIWNHGNITLGEWYNQTKGLQQKFYEIIMDI EQNSVQGKKGIQQLQEWEDWIGWIGNIPQYLKGLLGGIL GIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAMPEVEGEE IQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 387 MAEGFAANRQWIGPEEAEELLDFDIATQMNEEGPLNPGIN PFRVPGITEIEKQAYCKILQPRLQALRNEIQEVKLEEGNAG KFRRARFLRYSDVAILSLIHVFIGYCTYLCNQQKLGSLRHD IDIEAPQEEYYSNNEKGTTDNIKYGRRCVIGTVALYLLICT GIIIYTRTATAQVVWRLPPLVVPVEESEVIFWDCWAPEEPA CQDFLGAMIHLKASTNISIQEGPTLGNWAREIWGTLFKKA TRQCRRGRIWRRWNETITGPLGCANNTCYNISVIVPDYQC YLDRVDTWLQGKINISLCLTGGKMLYNRYTKQLSYCTDP LQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWNQRAY YNSCRWESTDVKFHCQRTQSQPGSWLRAISSWRQRNRW EWRPDFESEKVKVSLQCNSTKNLTFAMRSSGDYGDVTGA WIEFGCHRNKSRLHTEARFRIRCRWNVGDNTSLIDTCGKT QNIAGANPVDCTMYVNRMYNCSLQNGFTMKVDDLIMHF NMTKAVEMYNIAGNWSCTSNLPPTWGYINCNCTNSSDSN KMACPSSQGILRNWYNPVAGLRQSLEKYQVVKQPDYLV VPGEVMEYKPRRKRAAIHVMLALATILSMAGAGTGATAI GMVTQYHQVLATHQEAIEKVTEALKVNNLRLITLEHQVL VIGLKVEAMEKFRYTAFAMQELGCNQNQFFCKVPPELW KRYNMTINQTIWNHGNITLGEWYNQTKGLQQKFYEIIMDI EQNSVQGKKGIQQLQEWEDWIGWIGNIPQYLKGLLGGIL GIGLGVLLLILCLPTLVDCIRNCIHKILGYTVIAMPEVEGEE IQPQMELRRNGRQCGMSEKEEE SEQ ID NO: 388 MNEEGPLNPGINPFRVPGITETEKQDYCNMLQPKLQALRN EIQEVKLEEGNAGKFRRARFLRYSDETILSLIHLFIGYCTYL LNRKELGSLRHDIDIEAPQEECYSSREQSITDNIKYGKRCFI GTAGLYLLLFIGVGIYLGTAKAQVVWRLPPLVVPVEESEII FWDCWAPEEPACQDFLGAMIHLKASTNISIQEGPTLGNW AKEIWGTLFKKATRQCRRGRIWKRWNETISGPLGCANNT CYNISVIVPDYQCYLDRVDTWLQGKVNVSLCLTGGKILY NKYTKQLSYCTDPLQIPLISYTFGPNQTCMWDTSQIQDPEI PKCGWWNQIAYYNSCRWESTDVKFHCQRTQSQPGLWLR AISSWKQRNRWEWRPDFESEKAKVSLQCNSTKNLTFAMR SSGDYGEVTGAWIEFGCHRNKSKLHTEARFRIRCRWNVG DNTSLIDTCGETQNVSGANPVDCTMYANRMYNCSLQNGF TMKVDDLIMHFNMTKAVEMYDIAGNWSCTSDLPPTWGY MNCNCTNSSSTNSVKMACPKNQGILRNWYNPVAGLRQS LEKYQVVKQPDYLVVPGEVMEYKPRRKRAAIHVMLALA TVLSMAGAGTGATAIGMVTQYHQVLATHQETIEKVTEAL KINNLRLVTLEHQVLVIGLKVEAMEKRLYTAFAMQELGC NQNQFFCKVPPELWKRYNMTINQTIWNHGNITLGEWYNQ TKELQQKFYEIIMNIEQNNVQVKKGLQQLQEWEDWVGWI GNIPQYLKGLLGGILGIGIGVLLLILCLPTLVDCIRNCISKVL GYTVIAMPEIGDEEETVQMELRKNGRQCGMSEKEEE SEQ ID NO: 389 MNEEGPLNPGINPFRVPGITETEKQDYCNMLQPKLQALRN EIQEVKLEEGNAGKFRRARFLRYSDETILSLIHLFIGYCTYL LNRKELGSLRHDIDIEAPQEECYSSREQSITDNIKYGKRCFI GTAGLYLLLFIGVGIYLGTAKAQVVWRLPPLVVPVEESEII FWDCWAPEEPACQDFLGAMIHLKASTNISIQEGPTLGNW AKEIWGTLFKKATRQCRRGRIWKRWNETISGPLGCANNT CYNISVIVPDYQCYLDRVDTWLQGKVNVSLCLTGGKILY NKYTKQLSYCTDPLQIPLISYTFGPNQTCMWDTSQIQDPEI PKCGWWNQIAYYNSCRWESTDVKFHCQRTQSQPGLWLR AISSWKQRNRWEWRPDFESEKAKVSLQCNSTKNLTFAMR SSGDYGEVTGAWIEFGCHRNKSKLHTEARFRIRCRWNVG DNTSLIDTCGETQNVSGANPVDCTMYANRMYNCSLQNGF TMKVDDLIMHFNMTKAVEMYDIAGNWSCTSDLPPTWGY MNCNCTNSSSTNSVKMACPKNQGILRNWYNPVAGLRQS LEKYQVVKQPDYLVVPGEVMEYKPRRKRAAIHVMLALA TVLSMAGAGTGATAIGMVTQYHQVLATHQETIEKVTEAL KINNLRLVTLEHQVLVIGLKVEAMEKFRYTAFAMQELGC NQNQFFCKVPPELWKRYNMTINQTIWNHGNITLGEWYNQ TKELQQKFYEIIMNIEQNNVQVKKGLQQLQEWEDWVGWI GNIPQYLKGLLGGILGIGIGVLLLILCLPTLVDCIRNCISKVL GYTVIAMPEIGDEEETVQMELRKNGRQCGMSEKEEE SEQ ID NO: 390 <SEQ ID NO: 390; PRT; Artificial sequence> MAEGFAANRQWIGPEEAEELLDFDIATQMNEEGPLNPGIN PFRVPGITEIEKRDYCKILQPKLQDLKNEIQEVKLEEGNAG KFRRARFLRYSDENILSLIHLFIGYCTYLCRKNELGSLRHDI DIDEHQEEYYTNIEKGTTANIKYGRRCLIGTAALYLLFIGIII YTQTTKAQVVWRLPPFVVPVEESEIIFWDCWAPEEPACQD FLGAMIHLKASTNISIQEGPTLGNWAREIWGTLFKKATRQ CRRGRVWRRWNETITGPSGCANNTCYNISVIVPDYQCYL DRVDTWLQGKVNISLCLTGGKMLYNKYTKQLSYCTDPL QIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWNQAAYY NSCRWESTDVKFHCQRTQSLPGTWLRTISSWRPKNRWEW RPDFESEKVKVSLQCNSTNNLTFAMRSSGDYGEVTGAWI EFGCHRKKSKLHSEARFRIRCRWDKGDNTSLIDTCGKTQN VLGANPVDCTMYANRMYNCSLQNGFTMKIDDLVMHFN MTKAVEMYNIAGNWSCTSDLPPTWGYMNCNCTNSSSTSS SSGNKMACPGDKGILRNWYNPVAGLRQSLEKYQVVKQP DYLVVPGEVMEYKPRRKRAAIHVMLALATVLSMAGAGT GATAIGMVTQYHQVLATHQEAIEKVTEALKINNLRLVTLE HQVLVIGLKVEAMEKRLYTAFAMQELGCNQNQFFCKVPP VLWERYNMTINQTIWNHGNITLGEWYNQTKDLQQKFYEI IMDIEQNNVQGKKGLQQLQKWEDWVGWIGNIPKYLKGL LGGILGIGLGVILLILCLPTLVDCVRNCIHKILGYTVIAMPE VEEEEIQPQMELRRNGRQCGISEKEEE SEQ ID NO: 391 MAEGFAANRQWIGPEEAEELLDFDIATQMNEEGPLNPGIN PFRVPGITEIEKRDYCKILQPKLQDLKNEIQEVKLEEGNAG KFRRARFLRYSDENILSLIHLFIGYCTYLCRKNELGSLRHDI DIDEHQEEYYTNIEKGTTANIKYGRRCLIGTAALYLLFIGIII YTQTTKAQVVWRLPPFVVPVEESEIIFWDCWAPEEPACQD FLGAMIHLKASTNISIQEGPTLGNWAREIWGTLFKKATRQ CRRGRVWRRWNETITGPSGCANNTCYNISVIVPDYQCYL DRVDTWLQGKVNISLCLTGGKMLYNKYTKQLSYCTDPL QIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWNQAAYY NSCRWESTDVKFHCQRTQSLPGTWLRTISSWRPKNRWEW RPDFESEKVKVSLQCNSTNNLTFAMRSSGDYGEVTGAWI EFGCHRKKSKLHSEARFRIRCRWDKGDNTSLIDTCGKTQN VLGANPVDCTMYANRMYNCSLQNGFTMKIDDLVMHFN MTKAVEMYNIAGNWSCTSDLPPTWGYMNCNCTNSSSTSS SSGNKMACPGDKGILRNWYNPVAGLRQSLEKYQVVKQP DYLVVPGEVMEYKPRRKRAAIHVMLALATVLSMAGAGT GATAIGMVTQYHQVLATHQEAIEKVTEALKINNLRLVTLE HQVLVIGLKVEAMEKFRYTAFAMQELGCNQNQFFCKVPP VLWERYNMTINQTIWNHGNITLGEWYNQTKDLQQKFYEI IMDIEQNNVQGKKGLQQLQKWEDWVGWIGNIPKYLKGL LGGILGIGLGVILLILCLPTLVDCVRNCIHKILGYTVIAMPE VEEEEIQPQMELRRNGRQCGISEKEEE SEQ ID NO: 392 MAEGFAVNRQWIGPEEAEELLDFDIATQMNEEGPLNPGIN LFRVPGITETEKQEYCNILQPKLQDLRNEIQEVKLEEGNAG KFRRARFLRYSDETILSLIHLFIGYCTYLCKRNKLGTLVHN IDIEAPQEECYSNRERGTTVNIKYSRRCCIGTTALYLLLLT GIIIYTQTTQAQVVWRLPPLVVPVEESEIIFWDCWAPEEPA CQDFLGAMIYLKASTNISIQEGPTLGNWAREIWGTLFKKA TRQCRRGRIWRRWNETITGPSGCANNTCYNISVIVPDYQC YLDRVDTWLQGKVNISLCLTGGKMLYNKDTKQLSYCTD PLQIPLINYTFGPNQTCMWNTSQIQDSDIPKCGWWNQIAY YNSCRWEQTDVKFHCQRTQSQPGTWLRTISSWKQKNRW EWRPDFESEKVRVSLQCNTTKNLTFAMRSSGDYGEVTGA WIEFGCHRNKSKLHSDARFRIRCRWNVGDNTSLIDTCGN DPNVSGANPVDCTMYANRMYNCSLQNGFTMKVDDLIMH FNMTKAVEMYNIAGNWSCTSDLPSTWGYMNCNCTNSSS TDSNKMACPKRQGILRNWYNPVAGLRQSLEKYQVVKQP DYLVVPREVMEYKPRRKRAAIHVMLALATVLSMAGAGT GATAIGMVTQYHQVLATHQETIEKITEALKVNNLRLVTLE HQVLVIGLKVEAIEKRLYTAFAMQELGCNQNQFFCKVPP ELWQRYNMTINQTIWNHGNITLGEWYNQTKDLQQKFYEI IMDMEQNNVQGRKGLQQLQEWEDWVGWLGNIPRYLKG LLGGILGIGLGVLLLILCLPTLVDCIRNCISKVLGYTVIAMP EVEEEEIQPPMELRRNGRQCDMSEKEEE SEQ ID NO: 393 MAEGFAVNRQWIGPEEAEELLDFDIATQMNEEGPLNPGIN LFRVPGITETEKQEYCNILQPKLQDLRNEIQEVKLEEGNAG KFRRARFLRYSDETILSLIHLFIGYCTYLCKRNKLGTLVHN IDIEAPQEECYSNRERGTTVNIKYSRRCCIGTTALYLLLLT GIIIYTQTTQAQVVWRLPPLVVPVEESEIIFWDCWAPEEPA CQDFLGAMIYLKASTNISIQEGPTLGNWAREIWGTLFKKA TRQCRRGRIWRRWNETITGPSGCANNTCYNISVIVPDYQC YLDRVDTWLQGKVNISLCLTGGKMLYNKDTKQLSYCTD PLQIPLINYTFGPNQTCMWNTSQIQDSDIPKCGWWNQIAY YNSCRWEQTDVKFHCQRTQSQPGTWLRTISSWKQKNRW EWRPDFESEKVRVSLQCNTTKNLTFAMRSSGDYGEVTGA WIEFGCHRNKSKLHSDARFRIRCRWNVGDNTSLIDTCGN DPNVSGANPVDCTMYANRMYNCSLQNGFTMKVDDLIMH FNMTKAVEMYNIAGNWSCTSDLPSTWGYMNCNCTNSSS TDSNKMACPKRQGILRNWYNPVAGLRQSLEKYQVVKQP DYLVVPREVMEYKPRRKRAAIHVMLALATVLSMAGAGT GATAIGMVTQYHQVLATHQETIEKITEALKVNNLRLVTLE HQVLVIGLKVEAIEKFRYTAFAMQELGCNQNQFFCKVPPE LWQRYNMTINQTIWNHGNITLGEWYNQTKDLQQKFYEII MDMEQNNVQGRKGLQQLQEWEDWVGWLGNIPRYLKGL LGGILGIGLGVLLLILCLPTLVDCIRNCISKVLGYTVIAMPE VEEEEIQPPMELRRNGRQCDMSEKEEE SEQ ID NO: 394 MAAGFSQNRQWIGPEEAEELLDFDIATQINEEGPLNPGVN PFRVPGITDTEKQDYCKILQPKLQELREEINEVKLDEDNAG KFRRVRYLRYADETVLSLIYALVGYLRYLGNRNKLGSLR HDIDIEVSAKEQFDKKEKGTTINQKYCTRCCVGISVLYLIL FIIIVAVTGSQAQVVWRHPPLVVPVEETEIIFWDCWAPEEP ACQDFLGTMVQLKASINIGIQEGPTLGHWAREIWSTLF KKATRQCRRGRVWRRWNETITGPLGCANNTCYNISVVVP DYQCYVDRVDTWLQGRINISLCLTGGKMLYNKDTQQLS YCTEPLQIPLINYTFGPNQTCMWNTSLIEDSEIPKCGWWN QAAYYNSCKWEQTDVKFQCLRTQSQPGNWLRTISSWKQ SNRWIWRPDFESDKVKISLQCNSTKNLTFAMRSSGDYGEI TGAWIEFGCYRNKSKSHGEARFRIRCRWNEGTNTSLIDTC GSTPNVKGANPVDCTMKANTMYNCSLQNGFTMKIEDLIV HFNMTKAVEMYNIAGNWSCNSDIPPGWGYMNCNCTNST SSSFPTCPKMACPRERGILRNWYNPIAGLRHALQKYQVVK QPAYLLVPEEVMEYKPSQKRAAIHIILALATVLSIAGAGTG ATAIGMVTQYHQVLATHQKAIDQITEALKINNLRLVTLEH QVLVIGLKVEAIEKRIYTAFAMQELGCNQNQFFCKIPPEL WIRYNMSINQTIWNHGNISLRDWYNNTQQLQKKFYEIIYD IEQNNVQGKQGLQQLQKWETWVSWIGKIPQYLKGLFGSI LGIGLGILLMILCLPTLVDCMRNCLNRVLGYTVIAMPTIDD EGTDFPVELRRNGGQCGMSEKEEE SEQ ID NO: 395 MAAGFSQNRQWIGPEEAEELLDFDIATQINEEGPLNPGVN PFRVPGITDTEKQDYCKILQPKLQELREEINEVKLDEDNAG KFRRVRYLRYADETVLSLIYALVGYLRYLGNRNKLGSLR HDIDIEVSAKEQFDKKEKGTTINQKYCTRCCVGISVLYLIL FIIIVAVTGSQAQVVWRHPPLVVPVEETEIIFWDCWAPEEP ACQDFLGTMVQLKASINIGIQEGPTLGHWAREIWSTLFKK ATRQCRRGRVWRRWNETITGPLGCANNTCYNISVVVPDY QCYVDRVDTWLQGRINISLCLTGGKMLYNKDTQQLSYCT EPLQIPLINYTFGPNQTCMWNTSLIEDSEIPKCGWWNQAA YYNSCKWEQTDVKFQCLRTQSQPGNWLRTISSWKQSNR WIWRPDFESDKVKISLQCNSTKNLTFAMRSSGDYGEITGA WIEFGCYRNKSKSHGEARFRIRCRWNEGTNTSLIDTCGST PNVKGANPVDCTMKANTMYNCSLQNGFTMKIEDLIVHFN MTKAVEMYNIAGNWSCNSDIPPGWGYMNCNCTNSTSSSF PTCPKMACPRERGILRNWYNPIAGLRHALQKYQVVKQPA YLLVPEEVMEYKPSQKRAAIHIILALATVLSIAGAGTGATA IGMVTQYHQVLATHQKAIDQITEALKINNLRLVTLEHQVL VIGLKVEAIEKFRYTAFAMQELGCNQNQFFCKIPPELWIR YNMSINQTIWNHGNISLRDWYNNTQQLQKKFYEIIYDIEQ NNVQGKQGLQQLQKWETWVSWIGKIPQYLKGLFGSILGI GLGILLMILCLPTLVDCMRNCLNRVLGYTVIAMPTIDDEG TDFPVELRRNGGQCGMSEKEEE SEQ ID NO: 396 MAAGFTQNRQWIGPEEAEELLDFDIVTQINEEGPLNPGVN PFRVPAITDTEKQDYCKILQPKLQELREEIKETKLDESNAG KFRRVRYLRYADETALSLIYALVGYLRYLLERRKLGSLR HDVDIEVSAKEQFNKKEKGTTVNQNYCTKCCVGISVLYFI LFLILVAVTRSQAQVVWRLPPLVVPVEETEIIFWDCWAPE EPACQDFLGTMVQLKASINISIQEGPTLGHWAREILETLF KKATRQCRRGRVWKRWNETITGPLGCANNTCYNISVVVP DYQCYVDRVDTWLQGRINISLCLTGGKMLYNKDTQQLS YCTEPLQIPLINYTFGPNQTCMWNTSLIEDSEIPKCGWWN QAAYYNSCKWEQTDVKFQCQRTQSQPGTWLRAIASWKQ ANRWIWRPDFESDKVKISLQCNSTKNLTFAMRSSSDYGEI TGAWIEFGCYRNKSKFHDEARFRIRCRWNEGTNTSLIDTC GDNPNVTGANPVDCTMRANIMYNCSLQNGFTMKIEDLIV HFNMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNCTNG TDNTKMTCPENQGILRNWYNPVAGLRQALMKYQVVKQP EYLIVPEEVMQYKSKQKRAAIHIMLALATVLSMAGAGTG ATAIGMVTQYHQVLATHQQALDKITEALKINNLRLITLEH QVLVIGLKVEAIEKRLYTAFAMQELGCNQNQFFCKIPPSL WSMYNMTLNQTIWNHGNISLGNWYNQTRDLQNKFYEII MDIEQNNVQGKTGIQQLQKWENWVGWIGKIPQYLKGLL GSVLGIGLGILLLLICLPTLVDCIRNCTNKILGYTVIAMPEI DDEEVHLSVELRRNGRQCGISEKEEE SEQ ID NO: 397 MAAGFTQNRQWIGPEEAEELLDFDIVTQINEEGPLNPGVN PFRVPAITDTEKQDYCKILQPKLQELREEIKETKLDESNAG KFRRVRYLRYADETALSLIYALVGYLRYLLERRKLGSLR HDVDIEVSAKEQFNKKEKGTTVNQNYCTKCCVGISVLYFI LFLILVAVTRSQAQVVWRLPPLVVPVEETEIIFWDCWAPE EPACQDFLGTMVQLKASINISIQEGPTLGHWAREILETLF KKATRQCRRGRVWKRWNETITGPLGCANNTCYNISVVVP DYQCYVDRVDTWLQGRINISLCLTGGKMLYNKDTQQLS YCTEPLQIPLINYTFGPNQTCMWNTSLIEDSEIPKCGWWN QAAYYNSCKWEQTDVKFQCQRTQSQPGTWLRAIASWKQ ANRWIWRPDFESDKVKISLQCNSTKNLTFAMRSSSDYGEI TGAWIEFGCYRNKSKFHDEARFRIRCRWNEGTNTSLIDTC GDNPNVTGANPVDCTMRANIMYNCSLQNGFTMKIEDLIV HFNMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNCTNG TDNTKMTCPENQGILRNWYNPVAGLRQALMKYQVVKQP EYLIVPEEVMQYKSKQKRAAIHIMLALATVLSMAGAGTG ATAIGMVTQYHQVLATHQQALDKITEALKINNLRLITLEH QVLVIGLKVEAIEKFRYTAFAMQELGCNQNQFFCKIPPSL WSMYNMTLNQTIWNHGNISLGNWYNQTRDLQNKFYEII MDIEQNNVQGKTGIQQLQKWENWVGWIGKIPQYLKGLL GSVLGIGLGILLLLICLPTLVDCIRNCTNKILGYTVIAMPEI DDEEVHLSVELRRNGRQCGISEKEEE SEQ ID NO: 398 MAEGFCQNRQWIGPEEAEELLDFDIATQVSEEGPLNPGIN PFRQPGLTDGEKEEYCKILQPRLQALREEYKEGSLNSESA GKYRRVRYLRYSDLRVLSLLYLFIGYLAFFVRKRGLGKQ RQDIDIESKGTEEKFSKNEKGQTVNIRNCRILTIAICSFYIFL FIGIGIYAGKGEAQVIWRLPPLVVPVEDSEIIFWDCWAPEE PACQDFLGAMMHLKASTNISIQEGPTLGKWAKEIWATLF KKATRQCRRGKVWRKWNETITGPKGCANNTCYNVTVSIP DYQCYLDRVDTWLQGKVNISLCLTGGKMLYNKETKQLS YCTDPLQIPLINYTFGPNQTCMWNTSLIKNPDIPKCGWWN QAVYYNSCRWEKADVQFQCQRTQSQPGTWLRKISSWKQ KNRWEWRPDFESERVKISLQCNSTKNLTFAMRSSSDYSD VVGAWIEFGCHRNKSRRHTDARFRIRCKWNVGSNTSLID TCGKENITGANPVDCTMTAKTLYNCSLQEGFTMKIEDLIM HFNMTKAVEMYEIAGNWSCKSDLPTDWGYMKCNCTSRN ESEKMKCPAKDGILRNWYNPVAGLRQALDKYQVVKQPD YIVVPEEVLNYQSRQKRAAIHIMLALATVLSIAGAGTGAT AIGMVTQYHQVLATHQEALDKITEALKINNLRLVTLEHQ VLVIGLKVEATEKRLYTAFAMQELGCNQNQFFCKIPCEL WMRYNLTLNQTIWNHGNVTLQDWYNQTKQLQQKFYEII MDIEQNNVQGKKGIQQLQSWEYWTGWMGKIPQYLKGLL GGVLGIGLGILLLILCLPTLLDCMRNCINKVMGYTVIVMPE IDDEELSQNMELRRNGRQCGMSEKEEE SEQ ID NO: 399 MAEGFCQNRQWIGPEEAEELLDFDIATQVSEEGPLNPGIN PFRQPGLTDGEKEEYCKILQPRLQALREEYKEGSLNSESA GKYRRVRYLRYSDLRVLSLLYLFIGYLAFFVRKRGLGKQ RQDIDIESKGTEEKFSKNEKGQTVNIRNCRILTIAICSFYIFL FIGIGIYAGKGEAQVIWRLPPLVVPVEDSEIIFWDCWAPEE PACQDFLGAMMHLKASTNISIQEGPTLGKWAKEIWATLF KKATRQCRRGKVWRKWNETITGPKGCANNTCYNVTVSIP DYQCYLDRVDTWLQGKVNISLCLTGGKMLYNKETKQLS YCTDPLQIPLINYTFGPNQTCMWNTSLIKNPDIPKCGWWN QAVYYNSCRWEKADVQFQCQRTQSQPGTWLRKISSWKQ KNRWEWRPDFESERVKISLQCNSTKNLTFAMRSSSDYSD VVGAWIEFGCHRNKSRRHTDARFRIRCKWNVGSNTSLID TCGKENITGANPVDCTMTAKTLYNCSLQEGFTMKIEDLIM HFNMTKAVEMYEIAGNWSCKSDLPTDWGYMKCNCTSRN ESEKMKCPAKDGILRNWYNPVAGLRQALDKYQVVKQPD YIVVPEEVLNYQSRQKRAAIHIMLALATVLSIAGAGTGAT AIGMVTQYHQVLATHQEALDKITEALKINNLRLVTLEHQ VLVIGLKVEATEKFRYTAFAMQELGCNQNQFFCKIPCEL WMRYNLTLNQTIWNHGNVTLQDWYNQTKQLQQKFYEII MDIEQNNVQGKKGIQQLQSWEYWTGWMGKIPQYLKGLL GGVLGIGLGILLLILCLPTLLDCMRNCINKVMGYTVIVMPE IDDEELSQNMELRRNGRQCGMSEKEEE SEQ ID NO: 400 MAEGGFAQNQQWIGPEEAEELLDFDIAVQMNEEGPLNPG VNPFRVPGITPQEKDNYCTILQPRLQELKREIKEVKIEEEN AGKFRRARFLRYSDENVLSIVYLLTGYLRYLIDRKSLGSL RHDIDIEVPQKEQYSNNEKGNTVNRKYGRICCISTLFLYLL LFAGIGVWYGTTAQVVWRLPPLVVPIDDTEIIFWDCWAPE EPACQDFLGAMIHLKANINISIQEGPTLGNWAREIWSTLFK KATRQCRRGRIWRRWNETITGPLGCANNTCYNISVVIPDY QCYVDRVDTWLQGKVNISLCLTGGKMLFNKETKQLSYC TDPLQIPLINYTFGPNQTCEWNTSLIKDPEIPKCGWWNQN AYYNSCKWEQTDVKFQCQRIQSQPGSWIRAISSWRQRNR WEWRPDFESEKVKISLQCNSTRNLTFAMRSSSDYYDVQG AWIEFGCYRNKSIRHTGTRFRIRCRWNEGKNMSLIDTCGT DPNVTRANPVNCTLKTNTMYNCTLQDSFTMKIEDLIVHF NMSKAVEMYNIAGNWSCTSDLPTGWGYMKCNCTSTNNT GKMKCPEPEGILRNWYNPVAGLRQALMKYQVVKQPEYL IVPEEVMKYKSKQKRAAIHIMLALATVLSIAGAGTGATAI GMVTQYHQVLATHQQALEKITEALKINNLRLVTLEHQVL MIGLKVEAIEKRLYTAFAMQELGCNQNQFFCKIPLNLWT MYNMTINQTLWNHGNITLGDWYNQTKGLQEKFYEIIMDL EQNNVQGKLGIQQLQKWENWVGWIGKIPQYLKGLLGSV LGIGVGILLLIICLPTLVDCIRNCINKVLGYSVIAMPELDDE EVSMELRRNGRQCGMSEKEEE SEQ ID NO: 401 MAEGGFAQNQQWIGPEEAEELLDFDIAVQMNEEGPLNPG VNPFRVPGITPQEKDNYCTILQPRLQELKREIKEVKIEEEN AGKFRRARFLRYSDENVLSIVYLLTGYLRYLIDRKSLGSL RHDIDIEVPQKEQYSNNEKGNTVNRKYGRICCISTLFLYLL LFAGIGVWYGTTAQVVWRLPPLVVPIDDTEIIFWDCWAPE EPACQDFLGAMIHLKANINISIQEGPTLGNWAREIWSTLFK KATRQCRRGRIWRRWNETITGPLGCANNTCYNISVVIPDY QCYVDRVDTWLQGKVNISLCLTGGKMLFNKETKQLSYC TDPLQIPLINYTFGPNQTCEWNTSLIKDPEIPKCGWWNQN AYYNSCKWEQTDVKFQCQRIQSQPGSWIRAISSWRQRNR WEWRPDFESEKVKISLQCNSTRNLTFAMRSSSDYYDVQG AWIEFGCYRNKSIRHTGTRFRIRCRWNEGKNMSLIDTCGT DPNVTRANPVNCTLKTNTMYNCTLQDSFTMKIEDLIVHF NMSKAVEMYNIAGNWSCTSDLPTGWGYMKCNCTSTNNT GKMKCPEPEGILRNWYNPVAGLRQALMKYQVVKQPEYL IVPEEVMKYKSKQKRAAIHIMLALATVLSIAGAGTGATAI GMVTQYHQVLATHQQALEKITEALKINNLRLVTLEHQVL MIGLKVEAIEKFRYTAFAMQELGCNQNQFFCKIPLNLWT MYNMTINQTLWNHGNITLGDWYNQTKGLQEKFYEIIMDL EQNNVQGKLGIQQLQKWENWVGWIGKIPQYLKGLLGSV LGIGVGILLLIICLPTLVDCIRNCINKVLGYSVIAMPELDDE EVSMELRRNGRQCGMSEKEEE SEQ ID NO: 402 MAEGGFTQNHQWIGPEEAEELLDFDIAIQMNEEGPLNPGV NPFRVPGITSQEKDDYCKILQTKLQELKNEVKEVKIEEGN AGKFRRARFLRYSDENVLSIVYLLIGYLRYLIDHRSLGSLR HDIDIEAPQEEHYNNSEKGTTLNIKYGRRCCISTFIMYLILF AGVGIWFGARAQVVWRLPPLVVPVDDTEIIFWDCWAPEE PACQDFLGTMIHLKAKTNISIQEGPTLGNWAREIWATLFK KATRQCRRGRIWRRWNETITGPLGCANNTCYNISVVVPD YQCYLDRVDTWLQGKLNISLCLTGGKMLYNKVTKQLSY CTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWNQ MAYYNSCKWEEAKVKFHCQRTQSQPGSWHRAISSWKQR NRWEWRPDFKSKKVKISLQCNSTKNLTFAMRSSSDYYDV QGAWIEFGCHRNKSKGFSEARFRTRCKWNEGNNISLIDTC GTNPNVTGANPVDCTMKANIMYNCSLQDSFTMKIEDLIV HFNMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNCTNG TDNSKTKMACPRNQGILRNWYNPVAGLRQALIKYQVVK QPEYLIVPEEVMQYKVKQKRAAIHIMLALATVLSMAGAG TGATAIGMVTQYHQVLATHQHALDKITEALKINNLRLITL VHQVLVIGLKVRAIEKRLYTAFAMQELGCNQNQFFCKIPP SLWSMYNMTLNQTIWNHGNISLGNWYNQTRDLQNKFYE IIMDIEQNNVQGKTGIQQLQKWENWVGWIGKIPQYLKGL LGSVLGIGLGILLLLICLPTLVDCIRNCTHKILGYTVIAMPEI DDEEVHLSVELRRNGRQCGISEKEEE SEQ ID NO: 403 MAEGGFTQNHQWIGPEEAEELLDFDIAIQMNEEGPLNPGV NPFRVPGITSQEKDDYCKILQTKLQELKNEVKEVKIEEGN AGKFRRARFLRYSDENVLSIVYLLIGYLRYLIDHRSLGSLR HDIDIEAPQEEHYNNSEKGTTLNIKYGRRCCISTFIMYLILF AGVGIWFGARAQVVWRLPPLVVPVDDTEIIFWDCWAPEE PACQDFLGTMIHLKAKTNISIQEGPTLGNWAREIWATLFK KATRQCRRGRIWRRWNETITGPLGCANNTCYNISVVVPD YQCYLDRVDTWLQGKLNISLCLTGGKMLYNKVTKQLSY CTDPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWNQ MAYYNSCKWEEAKVKFHCQRTQSQPGSWHRAISSWKQR NRWEWRPDFKSKKVKISLQCNSTKNLTFAMRSSSDYYDV QGAWIEFGCHRNKSKGFSEARFRTRCKWNEGNNISLIDTC GTNPNVTGANPVDCTMKANIMYNCSLQDSFTMKIEDLIV HFNMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNCTNG TDNSKTKMACPRNQGILRNWYNPVAGLRQALIKYQVVK QPEYLIVPEEVMQYKVKQKRAAIHIMLALATVLSMAGAG TGATAIGMVTQYHQVLATHQHALDKITEALKINNLRLITL VHQVLVIGLKVRAIEKPRYTAFAMQELGCNQNQFFCKIPP SLWSMYNMTLNQTIWNHGNISLGNWYNQTRDLQNKFYE IIMDIEQNNVQGKTGIQQLQKWENWVGWIGKIPQYLKGL LGSVLGIGLGILLLLICLPTLVDCIRNCTHKILGYTVIAMPEI DDEEVHLSVELRRNGRQCGISEKEEE SEQ ID NO: 404 MAEGFAANRQWIGPEEAEELLDFDKATQMNEEGPLNPGV NPFRVPAVTEADKQEYCKILQPRLQEIRNEIQEVKLEEGN AGKFRRARFLRYSDESILSLIHLFIGYCTYLVNRRRLGSLR HDINIEAPQEEQYSSREQGTTENIKYGRRCLIGTASLYLLLF IGVAIYLGTTNAQIVWRLPPLVVPVEESEIIFWDCWAPEEP ACQDFLGAMIHLKASTNISIQEGPTLGNWAREIWGTLFKK ATRHCRRNKIWKRWNETITGPVGCANNTCYNISVIIPDYQ CYLDRVDTWLQGKVNISLCLTGGKMLYNRDTKQLSYCT DPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWNQIA YYNSCRWESTNVKFYCQRTQSQPGTWIRTISSWRQKNRW EWRPDFESEKVKISLQCNSTHNLTFAMRSSGDYGEVMGA WIEFGCHRNKSRFHTEARFRIRCRWNVGDNTSLIDTCGKN LNVSGANPVDCTMYANKMYNCSLQNGFTMKVDDLIMHF NMTKAVEMYNIAGNWSCKSDLPQNWGYMNCNCTNGTS NDNKMACPEDKGILRNWYNPVAGLRQALEKYQVVKQPE YIVVPTEVMTYKYKQKRAAIHIMLALATVLSIAGAGTGAT AIGMVTQYQQVLATHQEALDKITEALKINNLRLVTLEHQ MLVIGLKVEAIEKRLYTAFAMQELGCNQNQFFCEIPKELW LRYNMTLNQTIWNHGNITLGEWYNQTKYLQQKFYEIIMD IEQNNVQGKQGLQKLQNWQDWMGWIGKIPQYLKGLLGG ILGIGLGILLLILCLPTLVDCIRNCISKVLGYTVIAMPEIDDE EETVQMELRKNGRQCGMSEKEEE SEQ ID NO: 405 MAEGFAANRQWIGPEEAEELLDFDKATQMNEEGPLNPGV NPFRVPAVTEADKQEYCKILQPRLQEIRNEIQEVKLEEGN AGKFRRARFLRYSDESILSLIHLFIGYCTYLVNRRRLGSLR HDINIEAPQEEQYSSREQGTTENIKYGRRCLIGTASLYLLLF IGVAIYLGTTNAQIVWRLPPLVVPVEESEIIFWDCWAPEEP ACQDFLGAMIHLKASTNISIQEGPTLGNWAREIWGTLFKK ATRHCRRNKIWKRWNETITGPVGCANNTCYNISVIIPDYQ CYLDRVDTWLQGKVNISLCLTGGKMLYNRDTKQLSYCT DPLQIPLINYTFGPNQTCMWNTSQIQDPEIPKCGWWNQIA YYNSCRWESTNVKFYCQRTQSQPGTWIRTISSWRQKNRW EWRPDFESEKVKISLQCNSTHNLTFAMRSSGDYGEVMGA WIEFGCHRNKSRFHTEARFRIRCRWNVGDNTSLIDTCGKN LNVSGANPVDCTMYANKMYNCSLQNGFTMKVDDLIMHF NMTKAVEMYNIAGNWSCKSDLPQNWGYMNCNCTNGTS NDNKMACPEDKGILRNWYNPVAGLRQALEKYQVVKQPE YIVVPTEVMTYKYKQKRAAIHIMLALATVLSIAGAGTGAT AIGMVTQYQQVLATHQEALDKITEALKINNLRLVTLEHQ MLVIGLKVEAIEKFRYTAFAMQELGCNQNQFFCEIPKELW LRYNMTLNQTIWNHGNITLGEWYNQTKYLQQKFYEIIMD IEQNNVQGKQGLQKLQNWQDWMGWIGKIPQYLKGLLGG ILGIGLGILLLILCLPTLVDCIRNCISKVLGYTVIAMPEIDDE EETVQMELRKNGRQCGMSEKEEE SEQ ID NO: 406 MAEGGFTQNQQWIGPEEAEELLDFDIAVQMNEEGPLNPG VNPFRVPGITSQEKEDYCKILQTKLQELKNEVKGVKIEEG NAGKFRRARYLRYSDENVLSIVYLLIGYLRYLIDHRSLGSL RHDIDIETPQEEHFNNSEKGTTLNTKYGRRCCLSTFIMNLI LFAGVGIWLGARAQVVWRLPPLVVPVDDTEIIFWDCWAP EEPACQDFLGTMVQLKASINISIQEGPTLGHWAREILETLF KKATRQCRRGRVWRRWNETITGPLGCANNACYNISVVVP DYQCYVDRVDTWLQGRINISLCLTGGKMLYNKDTQQLS YCTEPLQIPLINYTFGPNQTCMWNTSLIEDSEIPKCGWWN QAAYYNSCKWEQTDVKFQCQRTQSQPGTWLRAIASWEQ ANRWIWRPDFESDKVKISLQCNSTKNLTFAMRSSSDYYD VQGAWIEFGCHRNKSRRHSEARFRIRCKWNEGKNISLIDT CGTNPNVTGANPVDCTMKANTMYNCSLQDSFTMKIEDLI VHFNMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNCTN GTDDSKTKMACPENQGILRNWYNPVAGLRQALIKYHVV KQPEYLIVPEEVMQYKVKQKRAAIHIMLALATVLSMAGA GTGATAIGMVTQYHQVLATHQQALDKITEALKINNLRLIT LEHQVLVIGLKVEAIEKRLYTAFAMQELGCNQNQFFCKIP PSLWSMYNMTLNQTIWNHGNISLGNWYNQTRDLQNKFY EIIMDIEQNNVQGKTGIQQLQKWENWMGWIGKIPQYLKG LLGSVLGIGLGILLLLICLPTLVDCIRNCTNKILGYTVIAMP EIDDEEVHLSVELRRNGRQCGISEKEEE SEQ ID NO: 407 MAEGGFTQNQQWIGPEEAEELLDFDIAVQMNEEGPLNPG VNPFRVPGITSQEKEDYCKILQTKLQELKNEVKGVKIEEG NAGKFRRARYLRYSDENVLSIVYLLIGYLRYLIDHRSLGSL RHDIDIETPQEEHFNNSEKGTTLNTKYGRRCCLSTFIMNLI LFAGVGIWLGARAQVVWRLPPLVVPVDDTEIIFWDCWAP EEPACQDFLGTMVQLKASINISIQEGPTLGHWAREILETLF KKATRQCRRGRVWRRWNETITGPLGCANNACYNISVVVP DYQCYVDRVDTWLQGRINISLCLTGGKMLYNKDTQQLS YCTEPLQIPLINYTFGPNQTCMWNTSLIEDSEIPKCGWWN QAAYYNSCKWEQTDVKFQCQRTQSQPGTWLRAIASWEQ ANRWIWRPDFESDKVKISLQCNSTKNLTFAMRSSSDYYD VQGAWIEFGCHRNKSRRHSEARFRIRCKWNEGKNISLIDT CGTNPNVTGANPVDCTMKANTMYNCSLQDSFTMKIEDLI VHFNMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNCTN GTDDSKTKMACPENQGILRNWYNPVAGLRQALIKYHVV KQPEYLIVPEEVMQYKVKQKRAAIHIMLALATVLSMAGA GTGATAIGMVTQYHQVLATHQQALDKITEALKINNLRLIT LEHQVLVIGLKVEAIEKFRYTAFAMQELGCNQNQFFCKIP PSLWSMYNMTLNQTIWNHGNISLGNWYNQTRDLQNKFY EIIMDIEQNNVQGKTGIQQLQKWENWMGWIGKIPQYLKG LLGSVLGIGLGILLLLICLPTLVDCIRNCTNKILGYTVIAMP EIDDEEVHLSVELRRNGRQCGISEKEEE SEQ ID NO: 408 MAEGGFTQNQQWIGPEEAEELLDFDIAVQMNEEGPLNPG VNPFRVPGITSQEKEDYCKTLQTNLQELKNEVKEVKIEEG NAGKFRRARFLRYSDENVLSIVYLLIGYLRYLIDHRSLGSL RHDIDIEAPQEEHYNNSEKGTTLNIKYARRCCISTFIMYLIL FAGVGIWLGARAQVVWRLPPLVVPVDDTEIIFWDCWAPE EPACQDFLGTMVQLKASINIGIQEGPTLGHWAREIWSTLF KKATRQCRRGRVWRRWNETITGPLGCANNTCYNISVVVP DYQCYVDRVDTWLQGRINISLCLTGGKMLYNKDTHQLS YCTEPLQIPLINCTFGPIQTCMWNTSLIQDPEIPKCGWWTQ VAYYNNCKWEEANVTFQCHRTQSRSGSWLRTISSWRQR NRWEWRPDFESEKVKISLQCNSTKNLTFAMRSSSDYYDV QGAWIEFGCHRNKSKKHSEARFRIRCKWNEGNNISLIDTC GTNPNVTGANPVDCTMKANTMYNCSLQDSFTMKIEDLIV HFNMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNCTNG TDDSKTKMACPENQGILRNWYNPVAGLRQALIKYQVVK QPEYLIVPEEVMQYKVKQKRAAIHIMLALATVLSMAGAG TGATAIGMVTQYHQVLATHQQALDKITEALKINNLRLITL EHQVLVIGLKVEAIEKRLYTAFAMQELGCNQNQFFCKIPP SLWSMYNMTLNQTIWNHGNISLGNWYNQTRDLQNKFYE IIMDIEQNNVQGKTGIQQLQKWENWVGWIGKIPQYLKGL LGSVLGIGLGILLLLICLPTLVDCIRNCTNKILGYTVIAMPEI DDEEVHLSVELRRNGRQCGISEKEEE SEQ ID NO: 409 MAEGGFTQNQQWIGPEEAEELLDFDIAVQMNEEGPLNPG VNPFRVPGITSQEKEDYCKTLQTNLQELKNEVKEVKIEEG NAGKFRRARFLRYSDENVLSIVYLLIGYLRYLIDHRSLGSL RHDIDIEAPQEEHYNNSEKGTTLNIKYARRCCISTFIMYLIL FAGVGIWLGARAQVVWRLPPLVVPVDDTEIIFWDCWAPE EPACQDFLGTMVQLKASINIGIQEGPTLGHWAREIWSTLF KKATRQCRRGRVWRRWNETITGPLGCANNTCYNISVVVP DYQCYVDRVDTWLQGRINISLCLTGGKMLYNKDTHQLS YCTEPLQIPLINCTFGPIQTCMWNTSLIQDPEIPKCGWWTQ VAYYNNCKWEEANVTFQCHRTQSRSGSWLRTISSWRQR NRWEWRPDFESEKVKISLQCNSTKNLTFAMRSSSDYYDV QGAWIEFGCHRNKSKKHSEARFRIRCKWNEGNNISLIDTC GTNPNVTGANPVDCTMKANTMYNCSLQDSFTMKIEDLIV HFNMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNCTNG TDDSKTKMACPENQGILRNWYNPVAGLRQALIKYQVVK QPEYLIVPEEVMQYKVKQKRAAIHIMLALATVLSMAGAG TGATAIGMVTQYHQVLATHQQALDKITEALKINNLRLITL EHQVLVIGLKVEAIEKFRYTAFAMQELGCNQNQFFCKIPP SLWSMYNMTLNQTIWNHGNISLGNWYNQTRDLQNKFYE IIMDIEQNNVQGKTGIQQLQKWENWVGWIGKIPQYLKGL LGSVLGIGLGILLLLICLPTLVDCIRNCTNKILGYTVIAMPEI DDEEVHLSVELRRNGRQCGISEKEEE SEQ ID NO: 410 MAEGGFTHNQQWIGPEEAEELLDFDIAVQMNEEGPLNPG VNPFRVPGITSQEKDDYCKILQTKLQELKNEVKEVKIEEG NAGKFRRARYLRYSDENVLSIVYLLIGYLRYLIDHRSLGSL RHDIDIETPQEEHYNNSEKGTTLNIKYGRRCCISTFIMYLIL FAGVGIWLGARAQVVWRLPPLVVPVDDTEIIFWDCWAPE EPACQDFLGTMIYLKANVNISIQEGPTLGNWAREIWSTLF KKATRQCRRGRIWRRWNETITGPLGCANNTCYNISVVVP DYQCYVDRVDTWLQGKVNISLCLTGGKMLYNKETRQLS YCTDPLQIPLINYTFGPNQTCMWNTSLIKDSEIPKCGWWN QVAYYDTCKWEEANVTFQCHRTQSQSGSWIRTISSWKQR NRWEWRPDFESEKVKISLQCNSTKNLTFAMRSSSDYYDV QGAWIEFGCHRNKSKRHSEARFRIRCKWNEGNNISLIDTC GTNPNVTGANPVDCTMKANTMYNCSLQDSFTMKIEDLIV HFNMTKAVELYNIAGNWSCTSDLPKGWGYMNCNCTNGT DNSETKMACPKNQGILRNWYNPVAGLRQALIKYQVVKQ PEYLIVPEEVMQYKFKQKRAAIHIMLALATVLSMAGAGT GATAIGMVTQYHQVLATHQQALEKITEALKINNLRLITLE HQVLVIGLRVEAIEKRLYTAFAMQELGCNQNQFFCKIPPS LWSMYNMTLNQTIWNHGNISLGNWYNQTRDLQNKFYEII MDIEQNNVQGKTGIQQLQKWENWVGWIGKIPQYLKGLL GSVLGIGLGILLLLICLPTLVDCIRNCTNKILGYTVIAMPEI DDEEVHLSVELRRNGRQCGISEKEEE SEQ ID NO: 411 MAEGGFTHNQQWIGPEEAEELLDFDIAVQMNEEGPLNPG VNPFRVPGITSQEKDDYCKILQTKLQELKNEVKEVKIEEG NAGKFRRARYLRYSDENVLSIVYLLIGYLRYLIDHRSLGSL RHDIDIETPQEEHYNNSEKGTTLNIKYGRRCCISTFIMYLIL FAGVGIWLGARAQVVWRLPPLVVPVDDTEIIFWDCWAPE EPACQDFLGTMIYLKANVNISIQEGPTLGNWAREIWSTL FKKATRQCRRGRIWRRWNETITGPLGCANNTCYNISVVV PDYQCYVDRVDTWLQGKVNISLCLTGGKMLYNKETRQL SYCTDPLQIPLINYTFGPNQTCMWNTSLIKDSEIPKCGWW NQVAYYDTCKWEEANVTFQCHRTQSQSGSWIRTISSWKQ RNRWEWRPDFESEKVKISLQCNSTKNLTFAMRSSSDYYD VQGAWIEFGCHRNKSKRHSEARFRIRCKWNEGNNISLIDT CGTNPNVTGANPVDCTMKANTMYNCSLQDSFTMKIEDLI VHFNMTKAVELYNIAGNWSCTSDLPKGWGYMNCNCTN GTDNSETKMACPKNQGILRNWYNPVAGLRQALIKYQVV KQPEYLIVPEEVMQYKFKQKRAAIHIMLALATVLSMAGA GTGATAIGMVTQYHQVLATHQQALEKITEALKINNLRLIT LEHQVLVIGLRVEAIEKFRYTAFAMQELGCNQNQFFCKIP PSLWSMYNMTLNQTIWNHGNISLGNWYNQTRDLQNKFY EIIMDIEQNNVQGKTGIQQLQKWENWVGWIGKIPQYLKG LLGSVLGIGLGILLLLICLPTLVDCIRNCTNKILGYTVIAMP EIDDEEVHLSVELRRNGRQCGISEKEEE SEQ ID NO: 412 MAEGGFTQNQQWIGPEEAEELLDFDIAVQMNEEGPLHPGI NPFRVPGITPQEKEDYCKILQPKLQELKGEIKEVKLEERNA GKFRRARYLRYSDENVLSIIYLLTGYFRYLINHRSLGALRH DIDIEAPQKEQYSNNEKGTTLNIKYGRVCCISTLLLYLLLF AGLGVWYGTSAQVVWRLPPLVVPVEDTEIIFWDCWAPEE PACQDFLGTMIHLKANVNISIQEGPTLGNWAREIWSTLFK KATRQCRRGRIWRRWNETITGPLGCANNTCYNISVVVPD YQCYVDRVDTWLQGKVNISLCLTGGKMLYNKETRQLSY CTDPLQIPLINYTFGPNQTCMWNTSLIKDSEIPKCGWWNQ VAYYNACKWEEANVTFQCHRTQSQPGSWIRTISSWKQRN RWEWRPDFESEKVKISLQCNSTKNLTFAMRSSSDYYDIQG AWIEFGYHRNKSKMHSEVRFRIRCKWNEGNNISLIDTCGT NPNVTGANPVDCTMKANTMYNCSLQDSFTMKIEDLIVHF NMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNCTNGTD ESGTKMACPKSQGILRNWYNPVAGLRQALIKYQVVKQPE YLIVPEEVMQYKFKQKRAAIHIMLALATVLSMAGAGTGA TAIGMVTQYHQVLATHQQALDKITQALKINNLRLITLEHQ VLVIGLKVEAIEKRLYTAFAMQELGCNQNQFFCKIPPSLW SMYNMTLNQTIWNHGNISLGNWYNQTKDLQNKFYEIIMD IEQNNVQGKTGIQQLQKWENWVGWIGKIPQYLKGLLGSV LGIGVGILLLIICLPTLVDCVRNCINKVLGYSVIAMPELDDE EVSMELRRNGRQCGMSEKEEE SEQ ID NO: 413 MAEGGFTQNQQWIGPEEAEELLDFDIAVQMNEEGPLHPGI NPFRVPGITPQEKEDYCKILQPKLQELKGEIKEVKLEERNA GKFRRARYLRYSDENVLSIIYLLTGYFRYLINHRSLGALRH DIDIEAPQKEQYSNNEKGTTLNIKYGRVCCISTLLLYLLLF AGLGVWYGTSAQVVWRLPPLVVPVEDTEIIFWDCWAPEE PACQDFLGTMIHLKANVNISIQEGPTLGNWAREIWSTLFK KATRQCRRGRIWRRWNETITGPLGCANNTCYNISVVVPD YQCYVDRVDTWLQGKVNISLCLTGGKMLYNKETRQLSY CTDPLQIPLINYTFGPNQTCMWNTSLIKDSEIPKCGWWNQ VAYYNACKWEEANVTFQCHRTQSQPGSWIRTISSWKQRN RWEWRPDFESEKVKISLQCNSTKNLTFAMRSSSDYYDIQG AWIEFGYHRNKSKMHSEVRFRIRCKWNEGNNISLIDTCGT NPNVTGANPVDCTMKANTMYNCSLQDSFTMKIEDLIVHF NMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNCTNGTD ESGTKMACPKSQGILRNWYNPVAGLRQALIKYQVVKQPE YLIVPEEVMQYKFKQKRAAIHIMLALATVLSMAGAGTGA TAIGMVTQYHQVLATHQQALDKITQALKINNLRLITLEHQ VLVIGLKVEAIEKFRYTAFAMQELGCNQNQFFCKIPPSLW SMYNMTLNQTIWNHGNISLGNWYNQTKDLQNKFYEIIMD IEQNNVQGKTGIQQLQKWENWVGWIGKIPQYLKGLLGSV LGIGVGILLLIICLPTLVDCVRNCINKVLGYSVIAMPELDDE EVSMELRRNGRQCGMSEKEEE SEQ ID NO: 414 MAEGGFTQNQQWIGPEEAEELLDFDIAVQMNEEGPLNPG VNPFRVPGITSQEKDDYCKVLQTKLQELKNEVKEVKIEEG NAGKFRRARYLRYSDENVLSIVYLLIGYLRYLIDHRSLGSL RHDIDIETPQEEHYNNSEKGTTLNTKYGRRCCLSTFIMYL VLFAGVGLWLGARAQVVWRLPPLVVPVDDTEIIFWDCW APEEPACQDFLGTMIYLKANVNISIQEGPTLGNWAREIWS TLFKKATRQCRRGRIWKRWNETITGPLGCATNTCYNISVV VPDYQCYVDRVDTWLQGKVNISLCLTGGKMLYNKETRQ LSYCTDPLQIPLINYTFGPNQTCMWNTSLIKDSEIPKCGW WNQVAYYNACKWEEANVTFQCQRTQSQSGSWIRTISSW KQRNRWEWRPDFESEKVKISLQCNSTKNLTFAMRSSSDY YDVQGAWIEFGCHRNKSKKYSEARFRIRCKWNEGKNISLI DTCGTNPNVTGANPVDCTMKANTMYNCSLQDSFTMKIE DLIVHFNMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNC TNGTDNSETKMTCPENQGILRNWYNPVAGLRQALIKYQV VKQPEYLIVPEEVMQYKFKQKRAAIHIMLALATVLSMAG AGTGATAIGMVTQYHQVLATHQQALEKITEALKINNLRLI TLEHQVLVIGLKVEAIEKRLYTAFAMQELGCHQNQFFCKI PPSLWSMYNMTLNQTIWNHGNISLGNWYNQTRDLQNKF YEIIMDIEQNNVQGKTGIQQLQKWENWMGWIGKIPQYLK GLLGSVLGIGLGILLLLICLPTLVDCIRNCTNKILGYTVIAM PEIDDEEVHLSVELRRNGRQCGISEKEEE SEQ ID NO: 415 MAEGGFTQNQQWIGPEEAEELLDFDIAVQMNEEGPLNPG VNPFRVPGITSQEKDDYCKVLQTKLQELKNEVKEVKIEEG NAGKFRRARYLRYSDENVLSIVYLLIGYLRYLIDHRSLGSL RHDIDIETPQEEHYNNSEKGTTLNTKYGRRCCLSTFIMYL VLFAGVGLWLGARAQVVWRLPPLVVPVDDTEIIFWDCW APEEPACQDFLGTMIYLKANVNISIQEGPTLGNWAREIWS TLFKKATRQCRRGRIWKRWNETITGPLGCATNTCYNISVV VPDYQCYVDRVDTWLQGKVNISLCLTGGKMLYNKETRQ LSYCTDPLQIPLINYTFGPNQTCMWNTSLIKDSEIPKCGW WNQVAYYNACKWEEANVTFQCQRTQSQSGSWIRTISSW KQRNRWEWRPDFESEKVKISLQCNSTKNLTFAMRSSSDY YDVQGAWIEFGCHRNKSKKYSEARFRIRCKWNEGKNISLI DTCGTNPNVTGANPVDCTMKANTMYNCSLQDSFTMKIE DLIVHFNMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNC TNGTDNSETKMTCPENQGILRNWYNPVAGLRQALIKYQV VKQPEYLIVPEEVMQYKFKQKRAAIHIMLALATVLSMAG AGTGATAIGMVTQYHQVLATHQQALEKITEALKINNLRLI TLEHQVLVIGLKVEAIEKFRYTAFAMQELGCHQNQFFCKI PPSLWSMYNMTLNQTIWNHGNISLGNWYNQTRDLQNKF YEIIMDIEQNNVQGKTGIQQLQKWENWMGWIGKIPQYLK GLLGSVLGIGLGILLLLICLPTLVDCIRNCTNKILGYTVIAM PEIDDEEVHLSVELRRNGRQCGISEKEEE SEQ ID NO: 416 MAEGGFTQNQQWIGPEEAEELLDFDIAVQMNEEGPLNPG VNPFRVPGITSQEKDDYCKILQTKLRELKNEVKEVKIEEG NAGKLRRARYLRYSDENVLSIVYLLIGYLRYLIDHRSLGS LRHDIDIETPQEEHYNNSEKGTTLNIKYEGRCCLSTFIMHLI LFAGVGIWLGARAQVVWRLPPLVVPVDDTEMIFWDCWA PEEPACQDFLGTMIHLKANVNISIQEGPTLGNWAREIWST LFKKATRQCRRGKIWRRWNETITGPLGCANNTCYNISVV VPDYQCYVDRVDTWLQGKVNISLCLTGGKMLYNKETRQ LSYCTDPLQIPLINYTFGPNQTCMWNASLIKDSEIPKCGW WNQAAYYNACKWEEANVTFQCHRTQSQSGSWIRTISSW RQRNRWEWRPDFESEKVKISLQCNSTKNLTFAMRSSSDY YDVQGAWIEFGCHRKKSNKHSEARFRIRCTWNEGNNISLI DTCGTNPNVTGANPVDCTMKANVMYNCTLQDSFTMKIE DLIVHFNMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNC TNGTDNTKMTCPKNQGILRNWYNPVAGLRQALIKYQVV KQPEYLIVPEEVMQYKVKQKRAAIHIMLALATVLSMAGA GTGATAIGMVTQYHQVLATHQQALDKITEALKINNLRLIT LEHQVLVIGLKVEAIEKRLYTAFAMQELGCNQNQFFCKIP PSLWSMYNMTLNQTIWNHGNISLGNWYNQTKDLQNKFY EIIMDIEQNNVQGKTGIQQLQKWENWVGWIGKIPQYLKG LLGSVLGIGLGILLLLICLPTLVDCIRSCTNRILGYTVIAMPE IDDEEVHLSVELRRNGRQCGISEKEEE SEQ ID NO: 417 MAEGGFTQNQQWIGPEEAEELLDFDIAVQMNEEGPLNPG VNPFRVPGITSQEKDDYCKILQTKLRELKNEVKEVKIEEG NAGKLRRARYLRYSDENVLSIVYLLIGYLRYLIDHRSLGS LRHDIDIETPQEEHYNNSEKGTTLNIKYEGRCCLSTFIMHLI LFAGVGIWLGARAQVVWRLPPLVVPVDDTEMIFWDCWA PEEPACQDFLGTMIHLKANVNISIQEGPTLGNWAREIWST LFKKATRQCRRGKIWRRWNETITGPLGCANNTCYNISVV VPDYQCYVDRVDTWLQGKVNISLCLTGGKMLYNKETRQ LSYCTDPLQIPLINYTFGPNQTCMWNASLIKDSEIPKCGW WNQAAYYNACKWEEANVTFQCHRTQSQSGSWIRTISSW RQRNRWEWRPDFESEKVKISLQCNSTKNLTFAMRSSSDY YDVQGAWIEFGCHRKKSNKHSEARFRIRCTWNEGNNISLI DTCGTNPNVTGANPVDCTMKANVMYNCTLQDSFTMKIE DLIVHFNMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNC TNGTDNTKMTCPKNQGILRNWYNPVAGLRQALIKYQVV KQPEYLIVPEEVMQYKVKQKRAAIHIMLALATVLSMAGA GTGATAIGMVTQYHQVLATHQQALDKITEALKINNLRLIT LEHQVLVIGLKVEAIEKFRYTAFAMQELGCNQNQFFCKIP PSLWSMYNMTLNQTIWNHGNISLGNWYNQTKDLQNKFY EIIMDIEQNNVQGKTGIQQLQKWENWVGWIGKIPQYLKG LLGSVLGIGLGILLLLICLPTLVDCIRSCTNRILGYTVIAMPE IDDEEVHLSVELRRNGRQCGISEKEEE SEQ ID NO: 418 MADGGFSQNQQWIGPEEAEKSLDFDIATQMNEEGPLNPG VNPFRVPGITPQEKEDYCKILQTRLQELKNELKEVKVEQR NAGKFRRTRFLRYSDENVLSIVYLLIGYLRYLIDRRSLGSL RHDIDIKIPQEEHYNNSAKDTTLNIKYERRCCIGTFIMYLIL FAGIGIWFGAKAQVVWRLPPLVVPVEESEIIFWDCWAPEE PACQDFLGAMIHLKANTNISIQEGPTLGNWAREIWSTLFK KATKQCRKGGIWTKWKETITGPLGCANNTCYNISVVVPD YQCYVDRVDTWLQGKVNISLCLTGGKMLFNKETKQLSY CTDPLQIPLINYTFGPNQTCMWNTSQIQDSEIPKCGWWNQ IAYYNSCQWEKTDVKFHCQRTQSQPGSWRRAISSWRQRN RWEWRPDFESKKVKVSLKCNSTKNLTFAMRSSGDYGEV TGAWIEFGCHRNKSKLHTEARFRIRCKWNEGNNISLIDTC GTNPNVAEANPVDCTMKANTMYNCSLQDSFTMKIEDLIV HFNMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNCTNG TTSNGIKMACPKQQGILRNWYNPVAGLRQALIKYQVVKQ PEYLIVPEEVLQYKFKQKRAAIHIMLALATVLSMAGAGTG ATAIGVVTQYHQVLATHQQALDKITEALKINNLRLITLEH QVLVIGLKVEAIEKRLYTAFAMQELGCNQNQFFCKIPLNL WNMYNMTLNQTIWNHGNISLGNWYNQTRDLQNKFYEII MDIEQNNVQGHTGIQQLQKWENWVGWIGKIPQYLKGLIG SVLGIGLGILLLLICLPTLVDCIRSCTNKMLGYTVIAMPEIG DEGVHLAMELRRNGRQCGISEKEEE SEQ ID NO: 419 MADGGFSQNQQWIGPEEAEKSLDFDIATQMNEEGPLNPG VNPFRVPGITPQEKEDYCKILQTRLQELKNELKEVKVEQR NAGKFRRTRFLRYSDENVLSIVYLLIGYLRYLIDRRSLGSL RHDIDIKIPQEEHYNNSAKDTTLNIKYERRCCIGTFIMYLIL FAGIGIWFGAKAQVVWRLPPLVVPVEESEIIFWDCWAPEE PACQDFLGAMIHLKANTNISIQEGPTLGNWAREIWSTLFK KATKQCRKGGIWTKWKETITGPLGCANNTCYNISVVVPD YQCYVDRVDTWLQGKVNISLCLTGGKMLFNKETKQLSY CTDPLQIPLINYTFGPNQTCMWNTSQIQDSEIPKCGWWNQ IAYYNSCQWEKTDVKFHCQRTQSQPGSWRRAISSWRQRN RWEWRPDFESKKVKVSLKCNSTKNLTFAMRSSGDYGEV TGAWIEFGCHRNKSKLHTEARFRIRCKWNEGNNISLIDTC GTNPNVAEANPVDCTMKANTMYNCSLQDSFTMKIEDLIV HFNMTKAVEMYNIAGNWSCTSDLPKGWGYMNCNCTNG TTSNGIKMACPKQQGILRNWYNPVAGLRQALIKYQVVKQ PEYLIVPEEVLQYKFKQKRAAIHIMLALATVLSMAGAGTG ATAIGVVTQYHQVLATHQQALDKITEALKINNLRLITLEH QVLVIGLKVEAIEKFRYTAFAMQELGCNQNQFFCKIPLNL WNMYNMTLNQTIWNHGNISLGNWYNQTRDLQNKFYEII MDIEQNNVQGHTGIQQLQKWENWVGWIGKIPQYLKGLIG SVLGIGLGILLLLICLPTLVDCIRSCTNKMLGYTVIAMPEIG DEGVHLAMELRRNGRQCGISEKEEE

The invention also encompasses the variants of the above sequences, harbouring the above mentioned mutations, and conferring to said variant a decrease of immunosuppressive properties, a substantial absence of immunosuppressive properties or an absence of immunosuppressive properties.

Advantageously: the mutated feline lentiviral proteins are:

1—SEQ ID NO: 5, SEQ ID NO: 317 to 342 and SEQ ID NO: 374 to 419; these mutated ENV proteins having decreased immunosuppressive properties, substantially no immunosuppressive properties or no immunosuppressive properties.

advantageously,

2—SEQ ID NO: 5, SEQ ID NO: 317 to 342 and SEQ ID NO: 374 to 419; these mutated ENV proteins having decreased immunosuppressive properties, substantially no immunosuppressive properties or no immunosuppressive properties, and being highly expressed at the plasma membrane,

more advantageously,

3—SEQ ID NO: 5, SEQ ID NO: 317 to 342, and SEQ ID NO: 374 to 419; these mutated ENV proteins having decreased immunosuppressive properties, substantially no immunosuppressive properties or no immunosuppressive properties, being highly expressed at the plasma membrane and possessing a medium or high fusogenic activity.

As mentioned above “possessing a medium or high fusogenic activity” means that when the ENV preteins are expressed at a cell plasma membrane, by using appropriate expression vectors the fusogenic activity of said proteins as measured by quantitating the ENV-mediated cell-cell fusion (see Materials and Methods) is:

-   -   either at a level comparable or higher to the ability of the         wild type ENV, i.e. high ability     -   or at a lower level compared to the ability of the wild type         ENV, i.e. medium or low ability.

In another aspect, the invention relates to a pharmaceutical composition comprising as active substance a nucleic acid molecule coding for a mutated feline lentiviral ENV protein, or a fragment of said mutated feline lentiviral ENV protein, as defined above.

In a particular embodiment, the invention concerns a pharmaceutical as defined above, wherein said nucleic acid molecule is contained in a vector, said vector comprising means allowing the expression of the mutated feline lentiviral ENV protein, or a fragment of said mutated feline lentiviral ENV protein, as defined above.

In another embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said nucleic acid molecule is comprised in a vector, said nucleic acid molecule being placed under the control of sequences that allow the expression of said mutated lentiviral ENV protein, or variant of said protein, or fragments thereof.

In another embodiment, the invention relates to a pharmaceutical composition, as defined above, in particular as a vaccine, comprising a DNA molecule coding for said mutated feline lentiviral ENV protein or a fragment thereof.

DNA vaccines expressing ENV proteins can be produced as described in Bellier et al. (Vaccine, 2009, 27(42):5772-80).

In another embodiment, the invention concerns a pharmaceutical as defined above, wherein said vector is chosen among a canarypox vector, a pox vector, a fowlpox, an adenoviral vector, a lentiviral vector, a measles vector, a Sendaï virus vector, a Cytomegalovirus vector or a Modified Vaccinia Ankara vector.

In another embodiment, the invention concerns a pharmaceutical as defined above, comprising at least one nucleic acid molecule coding for a GAG protein and/or a PRO protein and/or a POL protein of a feline lentivirus, said lentivirus being preferably of the same origin as the mutated lentiviral ENV protein.

GAG expression will produce virus-like particles (VLPs) which are particularly advantageous for a vaccine, in particular if the ENV protein is associated with the VLP (Guerbois et al., Virology, 2009, 388:191-203).

In another embodiment, the invention concerns a pharmaceutical as defined above, wherein said nucleic acid molecule coding for a mutated feline lentiviral ENV protein, or a fragment of said mutated feline lentiviral ENV protein, is contained in the same vector as the one which also contains said at least one nucleic acid molecule coding for a GAG protein and/or a PRO protein and/or a POL protein.

In another embodiment, the invention concerns a pharmaceutical as defined above, wherein said nucleic acid molecule coding for a mutated feline lentiviral ENV protein, or a fragment of said mutated feline lentiviral ENV protein, is contained in the same vector as the one which also contains all said at least one nucleic acid molecule coding for a GAG protein and/or a PRO protein and/or a POL protein.

In another embodiment, the invention concerns a pharmaceutical as defined above, wherein said nucleic acid molecule coding for a mutated feline lentiviral ENV protein, or a fragment of said mutated feline lentiviral ENV protein, is contained in a vector which is different from the at least one vector containing said at least one nucleic acid molecule coding for a GAG protein and/or a PRO protein and/or a POL protein.

In another embodiment, the invention concerns a pharmaceutical as defined above, wherein said nucleic acid molecule coding for a mutated feline lentiviral ENV protein, or a fragment of said mutated feline lentiviral ENV protein, said nucleic acid molecule coding for a GAG protein, said nucleic acid molecule coding for a PRO protein and said nucleic acid molecule coding for a POL protein, are all contained in vectors which are different from each other.

In another embodiment, the invention concerns a pharmaceutical as defined above, comprising at least one nucleic acid molecule coding for a GAG protein of a feline lentivirus, said lentivirus being preferably of the same origin as the mutated lentiviral ENV protein.

In another embodiment, the invention concerns a pharmaceutical as defined above, wherein said nucleic acid molecule coding for a mutated feline lentiviral ENV protein, or a fragment of said mutated feline lentiviral ENV protein, is contained in the same vector as the one which also contains said at least one nucleic acid molecule coding for a GAG protein.

In another embodiment, the invention concerns a pharmaceutical as defined above, wherein said nucleic acid molecule coding for a mutated feline lentiviral ENV protein, or a fragment of said mutated feline lentiviral ENV protein, is contained in the same vector as the one which also contains a nucleic acid molecule coding for a GAG protein.

In another embodiment, the invention concerns a pharmaceutical as defined above, wherein said nucleic acid molecule coding for a mutated feline lentiviral ENV protein, or a fragment of said mutated feline lentiviral ENV protein, is contained in the same vector as the one which also contains a nucleic acid molecule coding for a GAG protein,

said vector being preferably a canary pox vector (Poulet et al., Veterinary Record, 2003, 153(5):141-145; Vaccari et al., Expert Review of Vaccines, 2010, Vol. 9, No 9: 997-1005).

In another embodiment, the invention concerns a pharmaceutical as defined above, wherein said nucleic acid molecule coding for a mutated feline lentiviral ENV protein, or a fragment of said mutated feline lentiviral ENV protein, is contained in a vector which is different from the at least one vector containing said at least one nucleic acid molecule coding for a GAG protein.

In another embodiment, the invention concerns a pharmaceutical as defined above, wherein said nucleic acid molecule coding for a mutated feline lentiviral ENV protein, or a fragment of said mutated feline lentiviral ENV protein, and said nucleic acid molecule coding for a GAG protein are contained in vectors which are different from each other.

In another aspect, the invention concerns a pharmaceutical composition as defined above, in association with at least one antiviral compound, preferably for a simultaneous, separated or sequential use.

The composition according to the invention can also be used in combination with the antiviral compositions listed in Table 1 below:

TABLE 1 Examples of antiviral compounds. Intelence ® (TMC 125/etravirine) Non-nucleoside reverse Tibotec - transcriptase inhibitor Agenerase ®(APV/amprenavir) Protease inhibitor GSK - Aptivus ®(TPV/tipranavir) Protease inhibitor Boehringer - Crixivan ®(IDV/indinavir) MSD - Protease inhibitor Invirase ®(SQV/saquinavir) Roche - Protease inhibitor Kaletra ®(LPV.r/lopinavir + ritonavir) Protease inhibitor Abbott Norvir ®(ritonavir) Abbott - Protease inhibitor Prezista ®(TMC 114/darunavir) Protease inhibitor Tibotec/Janssen-Cilag - Reyataz ®(ATZ/atazanavir) BMS - Protease inhibitor Telzir ®(APV/fosamprenavir) GSK - Protease inhibitor Viracept ®(nelfinavir) Roche - Protease inhibitor Fuzeon ®(T20/enfuvirtide) Roche - Fusion inhibitor Celsentri ®(maraviroc) Pfizer - Entry inhibitor Isentress ®(MK 0518/raltegravir) Integrase inhibitor Merck - Rescriptor ®(delavirdine) Agouron - Non-nucleoside reverse transcriptase inhibitor Sustiva ®(EFV/efavirenz) BMS - Non-nucleoside reverse transcriptase inhibitor Viramune ®(nevirapine) Boehringer - Non-nucleoside reverse transcriptase inhibitor Combivir ®(Retrovir ® + Epivir ®) Nucleoside reverse transcriptase GSK - inhibitor Emtriva ®(FTC, emtricitabine) Gilead - Nucleoside reverse transcriptase inhibitor Epivir ®(3TC, lamivudine) GSK - Nucleoside reverse transcriptase inhibitor Kivexa ®(Ziagen ® + Epivir ®) Nucleoside reverse transcriptase GSK - inhibitor Retrovir ®(AZT/zidovudine) QSK - Nucleoside reverse transcriptase inhibitor Trizivir ®(Retrovir ® + Epivir ® + Nucleoside reverse transcriptase Ziagen ®) GSK - inhibitor Videx ®(ddI/didanosine) BMS - Nucleoside reverse transcriptase inhibitor Viread ®(TDF/tenofovir) Gilead - Nucleoside reverse transcriptase inhibitor Zerit ®(d4T/stavudine) BMS - Nucleoside reverse transcriptase inhibitor Ziagen ®(ABC/abacavir) GSK - Nucleoside reverse transcriptase inhibitor Truvada ®(Emtriva ® + Viread ®) Nucleoside reverse transcriptase Gilead - inhibitor Atripla ®(Sustiva ® + Emtriva ® + Nucleoside and non-nucleoside Viread ®) BMS/GILEAD reverse transcriptase inhibitor

In another aspect, the invention concerns a pharmaceutical composition as defined above, for its use for stimulating an immune response in a host organism.

In another aspect, the invention concerns a pharmaceutical composition as defined above, for its use for the prevention or the treatment of lentiviral infection, preferably FIV infection.

In another aspect, the invention concerns a pharmaceutical composition as defined above, for its use as a vaccine, in particular against FIV infection.

As mentioned above, the pharmaceutical composition according to the invention encompasses a vaccine, comprising as active substance, a protein as defined above, or a nucleic acid molecule as defined above, or a vector as defined above, or a combination thereof.

In a particular embodiment, the pharmaceutical composition according to the invention encompasses a vaccine as defined above, comprising a nucleic acid coding for a GAG protein as defined above and a nucleic acid coding for a mutated ENV protein as defined above, which are contained in a same vector, said same vector being preferably a canary pox vector.

In a particular embodiment, the pharmaceutical composition according to the invention encompasses a vaccine, comprising a GAG protein as defined above and a mutated ENV protein as defined above.

In a particular embodiment, the pharmaceutical composition according to the invention encompasses a vaccine, comprising a GAG protein as defined above and a mutated ENV protein as defined above which are associated to at least one adjuvant.

As examples of adjuvants, a non limitative list is given below:

-   -   Aluminum-based compounds such as aluminum phosphate and aluminum         hydroxide.     -   Immunostimulatory adjuvants like CpG, MPL and QS21 orMF59 which         is a squalene oil-in water emulsions.     -   Freunds incomplete adjuvant (FIA) or Freund's complete adjuvant         (FCA), can also be used.     -   Calcium phosphate in particular orthophosphates, metaphosphates         or pyrophosphates and occasionally hydrogen or hydroxide ions.     -   Muramyl dipeptide (N-Acetyl muramyl-L-alanine-D-isoglutamine,         MDP) and its synthetic analogs such as muramyl tripeptide         phosphatidylethanolamine MTPPTdEtn),     -   Trehalose-6,6′-dimycolate,     -   Saponins (Triterpenoid glycosides) like QS-21     -   Stearyl Tyrosine (octadecyl ester hydrochloride salt of         tyrosine)     -   Polysaccharides like:         -   Chitosan:         -   Inulin:         -   Beta-Glucans         -   Lipo-Polysaccharides or endotoxin         -   MGN-3Actinidia eriantha (AEPS):         -   Eldexomer:         -   CpG ODN     -   Liposomes like         -   Dehydration-rehydration liposome vesicles (DRVs)         -   Cytotoxic T lymphocyte (CTL)         -   CAF01         -   Liposomes containing lipid A (LA)     -   Lipid Polysine Core Peptides (LCP)     -   Cytokine like GM-CSF, IL-2, IL-12 or IL-15     -   Lipid A and Monophosphoryl Lipid A (MPL)     -   Lipopeptide which are molecules consisting of lipid connected to         a peptide. (They are derived from the lipoprotein of bacterial         cell wall.)     -   Exogenous Immunostimulatory Adjuvants which are compounds, or         proteins that are not found in the human body like:         -   Proteosomes in particular Multiple Antigenic Peptides (MAP)             or Exogenous Toxins.

Suitably, the total amount of mutated lentiviral ENV protein in a single dose of the immunogenic composition is 1-500 μg and/or the total amount of unfused polypeptides in a single dose of the immunogenic composition is 1-500 μg. In one embodiment, the total amount of all antigens in a single dose of the immunogenic composition is 1-1000 μg, 10-500 μg, 100-200 μg, or around 100 μg.

The amount of mutated feline lentiviral ENV protein in a dose of the immunogenic composition is selected as an amount which induces an immune response without significant, adverse side effects in typical recipients. Such amount will vary depending upon which specific immunogen is employed and the dosing or vaccination regimen that is selected. An optimal amount for a particular immunogenic composition can be ascertained by standard studies involving observation of relevant immune responses in infected animals.

Administration of the pharmaceutical composition can take the form of one or of more than one individual dose, for example as repeat doses of the same polypeptide containing composition, or in a heterologous “prime-boost” vaccination regime, including proteins and vectors. In one embodiment, the immunogenic composition of the invention is initially administered to a subject as two or three doses, wherein the doses are separated by a period of two weeks to three months, preferably one month. Conveniently, the composition is administered to an animal (for instance as a booster) every 6-24, or 9-18 months, for instance annually. For instance, the composition is administered to an animal (for instance as a booster) at six month or 1 year intervals. Suitably in this respect, subsequent administrations of the composition to the animal boost the immune response of earlier administrations of the composition to the same animal.

In an embodiment, the immunogenic composition of the invention is used as part of a prime-boost regimen for use in the treatment or prevention of disease or infection by FIV strains from one or more clades different from the one or more FIV clades in the immunogenic composition. Conveniently, the composition is the priming dose. Alternatively, the composition is the boosting dose.

Suitably, two or more priming and/or boosting doses are administered. A heterologous prime-boost regime uses administration of different forms of immunogenic composition or vaccine in the prime and the boost, each of which can itself include two or more administrations. The priming composition and the boosting composition will have at least one antigen in common, although it is not necessarily an identical form of the antigen, it can be a different form of the same antigen.

Prime boost immunisations according to the invention can be homologous prime-boost regimes or heterologous prime-boost regimes. Homologous prime-boost regimes utilize the same composition for prime and boost, for instance the immunogenic composition of the invention. Heterologous prime-boost regimes can be performed with a combination of protein and DNA-based formulations. Such a strategy is considered to be effective in inducing broad immune responses. Adjuvanted protein vaccines induce mainly antibodies and CD4+T cell immune responses, while delivery of DNA as a plasmid or a recombinant vector induces strong CD8+T cell responses.

Thus, the combination of protein and DNA vaccination can provide for a wide variety of immune responses. This is particularly relevant in the context of FIV, since neutralizing antibodies, CD4+T cells and CD8+T cells are thought to be important for the immune defense against FIV.

The invention also relates to a method for treating animals afflicted by pathologies related to lentiviral infections, comprising the administration to an animal in a need thereof of a pharmaceutically efficient amount of the pharmaceutical composition as defined above.

The invention also relates to a pharmaceutical composition as defined above, as a vaccine, for its use for the prevention or the traitement of FIV infection, or pathologies related to feline immunodeficiency.

In another aspect, the invention relates to a pharmaceutical composition comprising as active substance:

an isolated non naturally occurring mutated feline lentiviral ENV having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said mutated feline lentiviral ENV resulting from mutation of the transmembrane subunit (TM) of a wild type feline lentiviral ENV protein, the transmembrane subunit comprising an immunosuppressive domain (ISU) comprising the following amino acid sequence:

(SEQ ID NO: 343) A-[I/M/T/L]-E-K-F-L-Y-T-A, wherein the amino acids at the positions chosen among

-   -   the position 3 of SEQ ID NO: 343, and/or     -   the position 4 of SEQ ID NO: 343 and/or     -   the position 5 of SEQ ID NO: 343, and/or     -   the position 6 of SEQ ID NO: 343, and/or     -   the position 7 of SEQ ID NO: 343,         are:     -   either deleted,     -   or substituted by another amino acid such that         -   the amino acid residue at position 3 of SEQ ID NO: 1 is             substituted by A, F, G, L, R, C, D, H, I, K, M, N, P, Q, S,             T, V, W or Y, and/or         -   the amino acid residue at position 4 of SEQ ID NO: 1 is             substituted by A, F, G, L, R, C, D, E, H, I, M, N, P, Q, S,             T, V, W or Y, and/or         -   the amino acid residue at position 5 of SEQ ID NO: 1 is             substituted by A, G, L, R, C, D, E, H, I, K, M, N, P, Q, S,             T, V, W or Y, and/or         -   the amino acid residue at position 6 of SEQ ID NO: 1 is             substituted by A, F, G, R, C, D, E, H, I, K, M, N, P, Q, S,             T, V, W or Y, and/or         -   the amino acid residue at position 7 of SEQ ID NO: 1 is             substituted by A, F, G, L, R, C, D, E, H, I, K, M, N, P, Q,             S, T, V or W.

In another aspect, the invention relates to a method to obtain the active substance of a pharmaceutical composition, as defined above, consisting in modifying the immunosuppressive property of:

a wild-type feline lentiviral ENV protein,

or a fragment of said wild-type feline lentiviral ENV protein, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said ENV protein or fragment thereof presenting a transmembrane subunit (TM) comprising an immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 344) A-[I/M/T/L]-X_(A)-X_(B)-X_(C)-X_(D)-X_(E)-T-A, wherein

-   -   X_(A) is C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y, and     -   X_(B) is C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y, and     -   X_(C) is F, C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y, and     -   X_(D) is L, C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y, and     -   X_(E) is C, D, E, H, I, K, M, N, P, Q, 5, T, V, W or Y,         said method comprising a step of introduction of at least one         mutation of X_(A) and/or X_(B) and/or X_(C) and/or X_(D) and/or         X_(E),         to obtain:

an isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity,

said mutated feline lentiviral ENV protein having at least 70% identity, preferably at least 80% identity, to one sequence SEQ ID NO: 5,

or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein

-   -   X₁ is any amino acid different from E or deleted, and/or     -   X₂ is any amino acid different from K or deleted, and/or     -   X₃ is any amino acid different from F or deleted, and/or     -   X₄ is any amino acid different from L or deleted, and/or     -   X₅ is any amino acid different from Y or deleted.

In a particular embodiment, the invention concerns a method to obtain the active substance of a pharmaceutical composition, as defined above, consisting in modifying the immunosuppressive property of a wild-type feline lentiviral ENV protein, or a fragment of said wild-type feline lentiviral ENV protein, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids, said ENV protein or fragment thereof presenting a transmembrane subunit (TM) comprising an immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 345) [V/I]-[E/R]-A-[I/M/T/L]-X_(A)-X_(B)-X_(C)-X_(D)-X_(E)-T-A-[F/L]- A-M, wherein

-   -   X_(A) is C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y, and     -   X_(B) is C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y, and     -   X_(C) is F, C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y, and     -   X_(D) is L, C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y, and     -   X_(E) is C, D, E, H, I, K, M, N, P, Q, 5, T, V, W or Y,

said method comprising a step of introduction of at least one mutation of X_(A) and/or X_(B) and/or X_(C) and/or X_(D) and/or X_(E),

to obtain:

an isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity,

said mutated feline lentiviral ENV protein having at least 70% identity, preferably at least 80% identity, to one sequence SEQ ID NO: 5,

or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 3) [V/I]-[E/R]-A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A-[F/L]- A-M, wherein

-   -   X₁ is any amino acid different from E or deleted, and/or     -   X₂ is any amino acid different from K or deleted, and/or     -   X₃ is any amino acid different from F or deleted, and/or     -   X₄ is any amino acid different from L or deleted, and/or     -   X₅ is any amino acid different from Y or deleted.

In another embodiment, the invention concerns a method to obtain the active substance of a pharmaceutical composition, as defined above, consisting in modifying the immunosuppressive property of a wild-type feline lentiviral ENV protein, or a fragment of said wild-type feline lentiviral ENV protein, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said ENV protein or fragment thereof presenting a transmembrane subunit (TM) comprising an immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 346) A-[I/M/T/L]-E-K-[F/P]-[L/V/I]-Y-T-A,

said method comprising a step of introduction of at least one mutation of E in position 3 and/or K in position 4 and/or [F/P] in position 5 and/or [L/V/I] in position 6 and/or Y in position 7,

to obtain:

an isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity,

or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein

-   -   X₁ is any amino acid different from E or deleted, and/or     -   X₂ is any amino acid different from K or deleted, and/or     -   X₃ is any amino acid different from F or deleted, and/or     -   X₄ is any amino acid different from L or deleted, and/or     -   X₅ is any amino acid different from Y or deleted.

In another embodiment, the invention concerns a method to obtain the active substance of a pharmaceutical composition, as defined above, consisting in modifying the immunosuppressive property of a wild-type feline lentiviral ENV protein, or a fragment of said wild-type feline lentiviral ENV protein, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids, said ENV protein or fragment thereof presenting a transmembrane subunit (TM) comprising an immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 347) [V/I]-[E/R]-A-[I/M/T/L]-E-K-[F/P]-[L/V/I]-Y-T-A- [F/L]-A-M, said method comprising a step of introduction of at least one mutation of E in position 3 and/or K in position 4 and/or [F/P] in position 5 and/or [L/V/I] in position 6 and/or Y in position 7, to obtain:

an isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity,

or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 3) [V/I]-[E/R]-A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A-[F/L]- A-M, wherein

-   -   X₁ is any amino acid different from E or deleted, and/or     -   X₂ is any amino acid different from K or deleted, and/or     -   X₃ is any amino acid different from F or deleted, and/or     -   X₄ is any amino acid different from L or deleted, and/or     -   X₅ is any amino acid different from Y or deleted.

In another embodiment, the invention concerns a method to obtain the active substance of a pharmaceutical composition, as defined above, wherein said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein

-   -   X₁ is any amino acid different from E or deleted, and X₂, X₃, X₄         and X₅ are any amino acid, or     -   X₂ is any amino acid different from K or deleted, and X₁, X₃, X₄         and X₅ are any amino acid, or     -   X₃ is any amino acid different from F or deleted, and X₁, X₂, X₄         and X₅ are any amino acid, or     -   X₄ is any amino acid different from L or deleted, and X₁, X₂, X₃         and X₅ are any amino acid, or     -   X₅ is any amino acid different from Y or deleted, and X₁, X₂, X₃         and X₄ are any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, and X₃, X₄ and X₅ are         any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₃ is any         amino acid different from F or deleted, and X₂, X₄ and X₅ are         any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₄ is any         amino acid different from L or deleted, and X₂, X₃ and X₅ are         any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₅ is any         amino acid different from Y or deleted, and X₂, X₃ and X₄ are         any amino acid, or     -   X₂ is any amino acid different from K or deleted, X₃ is any         amino acid different from F or deleted, and X₁, X₄ and X₅ are         any amino acid, or     -   X₂ is any amino acid different from K or deleted, X₄ is any         amino acid different from L or deleted, and X₂, X₄ and X₅ are         any amino acid, or     -   X₂ is any amino acid different from K or deleted, X₅ is any         amino acid different from Y or deleted, and X₂, X₃ and X₄ are         any amino acid, or     -   X₃ is any amino acid different from F or deleted, X₄ is any         amino acid different from L or deleted, and X₂, X₄ and X₅ are         any amino acid, or     -   X₃ is any amino acid different from F or deleted, X₅ is any         amino acid different from Y or deleted, and X₂, X₃ and X₄ are         any amino acid, or     -   X₄ is any amino acid different from L or deleted, X₅ is any         amino acid different from Y or deleted, and X₂, X₄ and X₅ are         any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, X₃ is any amino acid         different from F or deleted, and X₄ and X₅ are any amino acid,         or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, X₄ is any amino acid         different from L or deleted, and X₃ and X₅ are any amino acid,         or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, X₅ is any amino acid         different from Y or deleted, and X₃ and X₄ are any amino acid,         or     -   X₁ is any amino acid different from E or deleted, X₃ is any         amino acid different from F or deleted, X₄ is any amino acid         different from L or deleted, and X₂ and X₅ are any amino acid,         or     -   X₁ is any amino acid different from E or deleted, X₃ is any         amino acid different from F or deleted, X₅ is any amino acid         different from Y or deleted, and X₂ and X₄ are any amino acid,         or     -   X₁ is any amino acid different from E or deleted, X₄ is any         amino acid different from L or deleted, X₅ is any amino acid         different from Y or deleted, and X₂ and X₃ are any amino acid,         or     -   X₂ is any amino acid different from K or deleted, X₃ is any         amino acid different from F or deleted, X₄ is any amino acid         different from L or deleted, and X₁ and X₅ are any amino acid,         or     -   X₂ is any amino acid different from K or deleted, X₃ is any         amino acid different from F or deleted, X₅ is any amino acid         different from Y or deleted, and X₁ and X₄ are any amino acid,         or     -   X₂ is any amino acid different from K or deleted, X₄ is any         amino acid different from L or deleted, X₅ is any amino acid         different from Y or deleted, and X₁ and X₃ are any amino acid,         or     -   X₃ is any amino acid different from F or deleted, X₄ is any         amino acid different from L or deleted, X₅ is any amino acid         different from Y or deleted, and X₁ and X₂ are any amino acid,         or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, X₃ is any amino acid         different from F or deleted, X₄ is any amino acid different from         L or deleted, and X₅ is any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, X₃ is any amino acid         different from F or deleted, X₅ is any amino acid different from         Y or deleted, and X₄ is any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, X₄ is any amino acid         different from L or deleted, X₅ is any amino acid different from         Y or deleted, and X₃ is any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₃ is any         amino acid different from F or deleted, X₄ is any amino acid         different from L or deleted, X₅ is any amino acid different from         Y or deleted, and X₂ is any amino acid, or     -   X₂ is any amino acid different from K or deleted, X₃ is any         amino acid different from F or deleted, X₄ is any amino acid         different from L or deleted, X₅ is any amino acid different from         Y or deleted and X₁ is any amino acid, or     -   X₁ is any amino acid different from E or deleted, X₂ is any         amino acid different from K or deleted, X₃ is any amino acid         different from F or deleted, X₄ is any amino acid different from         L or deleted and X₅ is any amino acid different from Y or         deleted.

In another embodiment, the invention concerns a method to obtain the active substance of a pharmaceutical composition, as defined above, wherein said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids, said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein

-   -   X₁ is R, G, L, A, F or deleted, and/or     -   X₂ is R, G, L, A, F or deleted, and/or     -   X₃ is R, G, L, A, or deleted, and/or     -   X₄ is R, G, A, F or deleted, and/or     -   X₅ is R, G, L, A, F or deleted.

In another embodiment, the invention concerns a method to obtain the active substance of a pharmaceutical composition, as defined above, wherein said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 3) [V/I]-[E/R]-A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A-[F/L]- A-M, wherein

-   -   X₁ is R, G, L, A, F or deleted, and/or     -   X₂ is R, G, L, A, F or deleted, and/or     -   X₃ is R, G, L, A, or deleted, and/or     -   X₄ is R, G, A, F or deleted, and/or     -   X₅ is R, G, L, A, F or deleted.

In another embodiment, the invention concerns a method to obtain the active substance of a pharmaceutical composition, as defined above, wherein said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity,

or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein

-   -   X₁ is R, G, L, A, F or deleted, and/or     -   X₂ is G, L, F or deleted, and/or     -   X₃ is R, G, L, A, or deleted, and/or     -   X₄ is R, G, A, F or deleted, and/or     -   X₅ is G, L, F or deleted.

In another embodiment, the invention concerns a method to obtain the active substance of a pharmaceutical composition, as defined above, wherein said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity,

or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein

-   -   X₃ is R, G, L, A or deleted, X₄ is L, C, D, E, H, I, K, M, N, P,         Q, S, T, V, W or Y, and X₁, X₂, X₅ are A, F, G, L, R, C, D, E,         H, I, K, M, N, P, Q, S, T, V, W or Y, or     -   X₄ is R, G, A, F or deleted, X₃ is F, C, D, E, H, I, K, M, N, P,         Q, S, T, V, W or Y, and X₁, X₂, X₅ are A, F, G, L, R, C, D, E,         H, I, K, M, N, P, Q, S, T, V, W or Y, or     -   X₃ is R, G, L, A or deleted, X₄ is R, G, A, F or deleted, and         X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H, I, K, M, N, P, Q, 5,         T, V, W or Y.

In another embodiment, the invention concerns a method to obtain the active substance of a pharmaceutical composition, as defined above, wherein said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity,

or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein

-   -   X₃ is R, A or deleted, X₄ is L, C, D, E, H, I, K, M, N, P, Q, S,         T, V, W or Y, and X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H, I,         K, M, N, P, Q, S, T, V, W or Y, or     -   X₄ is R, A or deleted, X₃ is F, C, D, E, H, I, K, M, N, P, Q, S,         T, V, W or Y, and X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H, I,         K, M, N, P, Q, S, T, V, W or Y, or     -   X₃ is R, A or deleted, X₄ is R, A or deleted, and X₁, X₂, X₅ are         A, F, G, L, R, C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y.

In another embodiment, the invention concerns a method to obtain the active substance of a pharmaceutical composition, as defined above, wherein said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity,

or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein

-   -   X₃ is R, X₄ is L, C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y,         and X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H, I, K, M, N, P, Q,         S, T, V, W or Y, or     -   X₄ is R, X₃ is F, C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y,         and X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H, I, K, M, N, P, Q,         S, T, V, W or Y, or     -   X₃ is R, X₄ is R, and X₁, X₂, X₅ are A, F, G, L, R, C, D, E, H,         I, K, M, N, P, Q, S, T, V, W or Y.

In another embodiment, the invention concerns a method to obtain the active substance of a pharmaceutical composition, as defined above, wherein said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity,

or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein

-   -   X₃ is R, and X₁ is E, X₂ is K, X₄ is L, X₅ is Y, or     -   X₄ is R, and X₁ is E, X₂ is K, X₃ is F, X₅ is Y, or     -   X₃ is R, X₄ is R, and X₁ is E, X₂ is K, X₅ is Y.

In another embodiment, the invention concerns a method to obtain the active substance of a pharmaceutical composition, as defined above, wherein said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein X₃ is R, and X₁, X₂, X₄, X₅ are A, F, G, L, R, C, D, E, H, I, K, M, N, P, Q, S, T, V, W or Y.

In another embodiment, the invention concerns a method to obtain the active substance of a pharmaceutical composition, as defined above

wherein said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity

or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein

-   -   X₃ is R, and X₁ is E, X₂ is K, X₄ is L, X₅ is Y.

In another embodiment, the invention concerns a method to obtain the active substance of a pharmaceutical composition, as defined above, consisting in modifying the immunosuppressive property of:

a wild-type feline lentiviral ENV protein,

or a fragment of said wild-type feline lentiviral ENV protein, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said ENV protein or fragment thereof presenting a transmembrane subunit (TM) comprising an immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 344) A-[I/M/T/L]-X_(A)-X_(B)-X_(C)-X_(D)-X_(E)-T-A, wherein

-   -   X_(A) is E, and     -   X_(B) is K, and     -   X_(C) is F or P, and     -   X_(D) is L, V or I, and     -   X_(E) is Y,         said method comprising a step of introduction of at least one         mutation of X_(A) and/or X_(B) and/or X_(C) and/or X_(D) and/or         X_(E),         to obtain:

an isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity,

said mutated feline lentiviral ENV protein having at least 70% identity, preferably at least 80% identity, to one sequence SEQ ID NO: 5,

or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids,

said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence:

(SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A, wherein

-   -   X₁ is any amino acid different from E, and X₂, X₃, X₄ and X₅ are         any amino acid, or     -   X₂ is any amino acid different from K, and X₁, X₃, X₄ and X₅ are         any amino acid, or     -   X₃ is any amino acid different from F, and X₁, X₂, X₄ and X₅ are         any amino acid, or     -   X₄ is any amino acid different from L, and X₁, X₂, X₃ and X₅ are         any amino acid, or     -   X₅ is any amino acid different from Y, and X₁, X₂, X₃ and X₄ are         any amino acid,         in particular, wherein     -   X₁ is R, G, L, A or F, and X₂, X₃, X₄ and X₅ are any amino acid,         or     -   X₂ is R, G, L, A or F, and X₁, X₃, X₄ and X₅ are any amino acid,         or     -   X₃ is R, G, L or A, and X₁, X₂, X₄ and X₅ are any amino acid, or     -   X₄ is R, G, A or F, and X₁, X₂, X₃ and X₅ are any amino acid, or         X₅ is R, G, L, A or F and X₁, X₂, X₃ and X₄ are any amino acid.

In other aspect, the invention also relates to pharmaceutical compositions comprising as active substance a mutated lentiviral protein isolated from other animal lentiviruses, infecting bovine, equine, ovine or caprine animal species.

In another aspect, the invention also relates to a pharmaceutical composition comprising as active substance an isolated mutated bovine lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

said mutated bovine lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type bovine lentiviral ENV protein, said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 420,

said mutated bovine lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 421) Y-L-Z^(A) ₁-Z^(A) ₂-Z^(A) ₃-Z^(A) ₄-Z^(A) ₅-[I/V]-[R/H], wherein,

-   -   Z^(A) ₁ is any amino acid different from E or deleted, and/or     -   Z^(A) ₂ is any amino acid different from Y or F or deleted,         and/or     -   Z^(A) ₃ is any amino acid different from V or L or deleted,         and/or     -   Z^(A) ₄ is any amino acid different from E or A or deleted,         and/or     -   Z^(A) ₅ is any amino acid different from E or deleted,         in association with a pharmaceutically acceptable carrier.

In another aspect, the invention also relates to a pharmaceutical composition comprising as active substance an isolated mutated bovine lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

said mutated bovine lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type bovine lentiviral ENV protein,

said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: SEQ ID NO: 420,

said mutated bovine lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 422) V-[S/T]-Y-L-Z^(A) ₁-Z^(A) ₂-Z^(A) ₃-Z^(A) ₄-Z^(A) ₅- [I/V]-[R/H]-[E/Q]-[K/L/V]-Q, wherein,

-   -   Z^(A) ₁ is any amino acid different from E or deleted, and/or     -   Z^(A) ₂ is any amino acid different from Y or F or deleted,         and/or     -   Z^(A) ₃ is any amino acid different from V or L or deleted,         and/or     -   Z^(A) ₄ is any amino acid different from E or A or deleted,         and/or     -   Z^(A) ₅ is any amino acid different from E or deleted,         in association with a pharmaceutically acceptable carrier.

In another aspect, the invention also relates to a pharmaceutical composition comprising as active substance an isolated mutated bovine lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

said mutated bovine lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type bovine lentiviral ENV protein,

said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 423,

said mutated bovine lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 424) Y-L-Z^(A) ₁-Z^(A) ₂-Z^(A) ₃-Z^(A) ₄-Z^(A) ₅-V-H, wherein,

-   -   Z^(A) ₁ is any amino acid different from E or deleted, and/or     -   Z^(A) ₂ is any amino acid different from F or deleted, and/or     -   Z^(A) ₃ is any amino acid different from L or deleted, and/or     -   Z^(A) ₄ is any amino acid different from A or deleted, and/or     -   Z^(A) ₅ is any amino acid different from E or deleted,         in association with a pharmaceutically acceptable carrier.

In another aspect, the invention also relates to a pharmaceutical composition comprising as active substance an isolated mutated bovine lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

said mutated bovine lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type bovine lentiviral ENV protein,

said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 423,

said mutated bovine lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 425) V-T-Y-L-Z^(A) ₁-Z^(A) ₂-Z^(A) ₃-Z^(A) ₄-Z^(A) ₅-V-H-E-[L/V]-Q, wherein,

-   -   Z^(A) ₁ is any amino acid different from E or deleted, and/or     -   Z^(A) ₂ is any amino acid different from F or deleted, and/or     -   Z^(A) ₃ is any amino acid different from L or deleted, and/or     -   Z^(A) ₄ is any amino acid different from A or deleted, and/or     -   Z^(A) ₅ is any amino acid different from E or deleted,         in association with a pharmaceutically acceptable carrier.

In a particular embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said mutated bovine lentiviral Env protein, or said fragment thereof, further comprises additional mutations of at least one amino acid chosen among the 5^(th), 6^(th), 7^(th), 8^(th) and 9^(th) amino acids, in particular the 7^(th) amino acid, located upstream the amino acid Z^(A) ₁ of SEQ ID NO: 421, SEQ ID NO: 422, SEQ ID NO: 424 or SEQ ID NO: 425.

In another aspect, the invention relates to a pharmaceutical composition comprising as active substance a nucleic acid molecule coding for a mutated bovine lentiviral ENV protein, or a fragment of said mutated bovine lentiviral ENV protein, as defined above.

In another aspect, the invention also relates to a pharmaceutical composition comprising as active substance an isolated mutated equine lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

said mutated equine lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type equine lentiviral ENV protein,

said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 426,

said mutated equine lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 427) L-L-Z^(B) ₁-Z^(B) ₂-Z^(B) ₃-Z^(B) ₄-Z^(B) ₅-[V/I]-E, wherein,

-   -   Z^(B) ₁ is any amino acid different from K or deleted, and/or     -   Z^(B) ₂ is any amino acid different from E or deleted, and/or     -   Z^(B) ₃ is any amino acid different from R or K or Q or deleted,         and/or     -   Z^(B) ₄ is any amino acid different from Q or deleted, and/or     -   Z^(B) ₅ is any amino acid different from Q or L or K or deleted,         and/or         in association with a pharmaceutically acceptable carrier.

In another aspect, the invention also relates to a pharmaceutical composition comprising as active substance an isolated mutated equine lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

said mutated equine lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type equine lentiviral ENV protein,

said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 426,

said mutated equine lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 428) V-[Q/R]-L-L-Z^(B) ₁-Z^(B) ₂-Z^(B) ₃-Z^(B) ₄-Z^(B) ₅-[V/I]-E-E-T-F, wherein,

-   -   Z^(B) ₁ is any amino acid different from K or deleted, and/or     -   Z^(B) ₂ is any amino acid different from E or deleted, and/or     -   Z^(B) ₃ is any amino acid different from K or Q or deleted,         and/or     -   Z^(B) ₄ is any amino acid different from Q or deleted, and/or     -   Z^(B) ₅ is any amino acid different from Q or L or K or deleted,         and/or         in association with a pharmaceutically acceptable carrier.

In a particular embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said mutated equine lentiviral ENV protein, or said fragment thereof, further comprises additional mutations of at least one amino acid chosen among the 5^(th), 6^(th), 7^(th), 8^(th) and 9^(th) amino acids, in particular the 7^(th) amino acid, located upstream the amino acid Z^(A) ₁ of SEQ ID NO: 427 or SEQ ID NO: 428.

In another aspect, the invention relates to a pharmaceutical composition comprising as active substance a nucleic acid molecule coding for a mutated equine lentiviral ENV protein, or a fragment of said mutated equine lentiviral ENV protein, as defined above.

In another aspect, the invention also relates to a pharmaceutical composition comprising as active substance an isolated mutated caprine lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

said mutated caprine lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type caprine lentiviral ENV protein,

said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 429,

said mutated caprine lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 432) R-[V/M-Z^(A) ₁-Z^(A) ₂-Z^(A) ₃-Z^(A) ₄-Z^(A) ₅-R-[M/I], wherein,

-   -   Z^(A) ₁ is any amino acid different from E or deleted, and/or     -   Z^(A) ₂ is any amino acid different from A or T or V or deleted,         and/or     -   Z^(A) ₃ is any amino acid different from I or L or V or M or         deleted, and/or     -   Z^(A) ₄ is any amino acid different from T or V or M or I or         deleted, and/or     -   Z^(A) ₅ is any amino acid different from D or deleted,         in association with a pharmaceutically acceptable carrier.

In another aspect, the invention also relates to a pharmaceutical composition comprising as active substance an isolated mutated caprine lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

said mutated caprine lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type caprine lentiviral ENV protein,

said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 429,

said mutated caprine lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 433) V-A-R-[V/M]-Z^(A) ₁-Z^(A) ₂-Z^(A) ₃-Z^(A) ₄-Z^(A) ₅-R-[M/I]-M-[L/I/V]- Y, wherein,

-   -   Z^(A) ₁ is any amino acid different from E or deleted, and/or     -   Z^(A) ₂ is any amino acid different from A or T or V or deleted,         and/or     -   Z^(A) ₃ is any amino acid different from I or L or V or M or         deleted, and/or     -   Z^(A) ₄ is any amino acid different from T or V or M or I or         deleted, and/or     -   Z^(A) ₅ is any amino acid different from D or deleted,         in association with a pharmaceutically acceptable carrier.

In a particular embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said mutated caprine lentiviral ENV protein, or said fragment thereof, further comprises additional mutations of at least one amino acid chosen among the 5^(th), 6^(th), 7^(th), 8^(th) and 9^(th) amino acids, in particular the 7^(th) amino acid, located upstream the amino acid Z^(A) ₁ of SEQ ID NO: 432 or SEQ ID NO: 433.

In another aspect, the invention relates to a pharmaceutical composition comprising as active substance a nucleic acid molecule coding for a mutated caprine lentiviral ENV protein, or a fragment of said mutated caprine lentiviral ENV protein, as defined above.

In another aspect, the invention also relates to a pharmaceutical composition comprising as active substance an isolated mutated ovine lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

said mutated ovine lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type ovine lentiviral ENV protein,

said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 430,

said mutated ovine lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 432) R-[V/M]-Z^(A) ₁-Z^(A) ₂-Z^(A) ₃-Z^(A) ₄-Z^(A) ₅-R-[M/I], wherein,

-   -   Z^(A) ₁ is any amino acid different from E or deleted, and/or     -   Z^(A) ₂ is any amino acid different from A or T or V or deleted,         and/or     -   Z^(A) ₃ is any amino acid different from I or L or V or M or         deleted, and/or     -   Z^(A) ₄ is any amino acid different from T or V or M or I or         deleted, and/or     -   Z^(A) ₅ is any amino acid different from D or deleted,         in association with a pharmaceutically acceptable carrier.

In another aspect, the invention also relates to a pharmaceutical composition comprising as active substance an isolated mutated ovine lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

said mutated ovine lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type ovine lentiviral ENV protein,

said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 430

said mutated ovine lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 433) V-A-R-[V/M]-Z^(A) ₁-Z^(A) ₂-Z^(A) ₃-Z^(A) ₄-Z^(A) ₅-R-[M/I]-M-[L/I/V]- Y, wherein,

-   -   Z^(A) ₁ is any amino acid different from E or deleted, and/or     -   Z^(A) ₂ is any amino acid different from A or T or V or deleted,         and/or     -   Z^(A) ₃ is any amino acid different from I or L or V or M or         deleted, and/or     -   Z^(A) ₄ is any amino acid different from T or V or M or I or         deleted, and/or     -   Z^(A) ₅ is any amino acid different from D or deleted,         in association with a pharmaceutically acceptable carrier.

In another aspect, the invention also relates to a pharmaceutical composition comprising as active substance an isolated mutated ovine lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

said mutated ovine lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type ovine lentiviral ENV protein,

said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 431

said mutated ovine lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 432) R-[V/M]-Z^(A) ₁-Z^(A) ₂-Z^(A) ₃-Z^(A) ₄-Z^(A) ₅-R-[M/I], wherein,

-   -   Z^(A) ₁ is any amino acid different from E or deleted, and/or     -   Z^(A) ₂ is any amino acid different from A or T or V or deleted,         and/or     -   Z^(A) ₃ is any amino acid different from I or L or V or M or         deleted, and/or     -   Z^(A) ₄ is any amino acid different from T or V or M or I or         deleted, and/or     -   Z^(A) ₅ is any amino acid different from D or deleted,         in association with a pharmaceutically acceptable carrier.

In another aspect, the invention also relates to a pharmaceutical composition comprising as active substance an isolated mutated ovine lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof,

said mutated ovine lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type ovine lentiviral ENV protein,

said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 431

said mutated ovine lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence:

(SEQ ID NO: 433) V-A-R-[V/M]-Z^(A) ₁-Z^(A) ₂-Z^(A) ₃-Z^(A) ₄-Z^(A) ₅-R-[M/I]-M-[L/I/V]- Y, wherein,

-   -   Z^(A) ₁ is any amino acid different from E or deleted, and/or     -   Z^(A) ₂ is any amino acid different from A or T or V or deleted,         and/or     -   Z^(A) ₃ is any amino acid different from I or L or V or M or         deleted, and/or     -   Z^(A) ₄ is any amino acid different from T or V or M or I or         deleted, and/or     -   Z^(A) ₅ is any amino acid different from D or deleted,         in association with a pharmaceutically acceptable carrier.

In a particular embodiment, the invention relates to a pharmaceutical composition as defined above, wherein said mutated ovine lentiviral ENV protein, or said fragment thereof, further comprises additional mutations of at least one amino acid chosen among the 5^(th), 6^(th), 7^(th), 8^(th) and 9^(th) amino acids, in particular the 7^(th) amino acid, located upstream the amino acid Z^(A) ₁ of SEQ ID NO: 432 or SEQ ID NO: 433.

In another aspect, the invention relates to a pharmaceutical composition comprising as active substance a nucleic acid molecule coding for a mutated ovine lentiviral ENV protein, or a fragment of said mutated ovine lentiviral ENV protein, as defined above.

LEGEND TO THE FIGURES

FIG. 1:

(A) FIV Envelope phylogeny, with the A-D subtypes indicated and the reference Petaluma strain boxed (from Pu et al, Journal of Feline Medicine and Surgery, 2005, 7:65-70).

(B) Structure of the FIV Envelope protein, delineation of the characteristic functional domains and alignment of the 64-aa immunosuppressive-containing domains from selected FIV Env proteins. The SU and TM subunits of the FIV Env are indicated, together with the fusion peptide, the transmembrane anchoring domain of the TM subunit, and the immunosuppressive domain (ISD).

The aligned sequences of the 64-aa immunosuppressive-containing domains correspond to fragments of the Envelope protein from 33 distinct strains (i.e. 33 different accession numbers), only 20 of these 64-aa fragments are different (i.e. 20 SEQ ID numbers have been given).

FIG. 2:

Immunosuppressive activity of the full-length FIV envelope protein (FIV Env) and of the 64 aa-long FIV envelope subdomain delineated in FIG. 1 (FIV64 Env). Immunosuppression was tested using the in vivo MCA205 tumor rejection assay (see scheme on top and Materials and Methods): MCA205 tumor cells are transduced with an expression vector (containing a selectable hygromycin gene) for the indicated Env protein or fragment, stably transduced cells are then selected for expression of the corresponding Env, and are finally engrafted into Balb/c mice (allogenic graft, normally resulting in tumor rejection); tumor growth/rejection is then monitored and provides an immunosuppressive index (calculated as indicated in Materials and Methods). Y-axis corresponds to the value of the immunosuppression index. Immunosuppression indexes are means of at least 3 independent experiments, with standard deviation. The Murine Leukemia Virus (MLV) envelope ectodomains, wild-type and mutant (Schlecht-Louf et al., Proc Natl Acad Sci USA. 2010, 107(8):3782-7) are used as an internal control.

FIG. 3:

Functional identification of the aminoacids in the FIV envelope 64 aa domain directly involved in immunosuppressive activity, and search for aminoacid substitutions inhibiting this activity. Immunosuppressive activity was tested as in FIG. 2, using the in vivo MCA205 tumor rejection assay (see Materials and Methods). The mutated aminoacids are indicated with their position (see sequence of FIV64 on top) and the nature of the substitution. Wwt and Wmut are controls (from the human endogenous retrovirus HERV-W Envelope, Mangeney et al., Proc Natl Acad Sci USA. 2007, 104(51):20534-9). Immunosuppression indexes correspond to 3 independent experiments, with standard deviation.

FIG. 4:

Antibody response of mice inoculated with cells expressing wild-type and mutant FIV64 Env domains (see scheme on top): MCA205 tumor cells are stably transduced as in FIG. 2 with expression vectors for the indicated FIV64 Env wt and mutants, and cells engrafted into C57B1/6 mice (syngenic graft, resulting in constant tumor growth without rejection); specific anti-FIV64 antibodies are quantitated from the collected blood samples as indicated in Materials and Methods. Results are representative of 2 independent experiments.

FIG. 5:

Antibody response of mice injected with MBP-FIV64, wt and mutants, recombinant proteins (see scheme on top): FIV64 Env, wt and mutants, fused with MBP are i.v. injected three times with a 1-week interval into Balb/C mice (10 μg per injection); mice are then blood-sampled and anti-MBP IgG levels are determined by ELISA using plates coated with MBP-LacZα (MBP-LacZα is a control MBP fusion with the 83aa LacZα fragment (α-subunit of E. coli β-galactosidase, see Materials and Methods). Results are representative of 2 independent experiments.

FIG. 6:

Expression of the FIV Env proteins, wt and mutants, at the surface of cells transfected with the indicated expression vectors (see scheme on top).

Expression profile of the wild-type and mutant FIV Env proteins was assayed by FACS analysis using full-length FIVenv-expressing vectors and an anti-SU FIVenv monoclonal antibody (Antibodies-online, BmbH, Germany). The data correspond to the Mean Fluorescence Intensity, from three independent experiments, with standard deviation.

FIG. 7:

Functional characterization of the FIV Env proteins, wild-type (wt) and mutants. Fusogenic activity of the FIVenv, wild-type and mutants, are measured by a cell-cell fusion assay and quantified by a fusion index (see scheme on top and Materials and Methods). The data correspond to three independent experiments, with standard deviation).

EXAMPLES The FIV Envelope and a Delineated Subdomain of the TM Subunit are Immunosuppressive In Vivo

Identification of an immunosuppressive activity of the FIV envelope and of the domain within the FIV envelope responsible for this activity was achieved using an in vivo tumor rejection assay that we had previously used to demonstrate the immunosuppressive activity of the Env protein of oncoretroviruses (e.g. murine MoMLV and simian MPMV, see Mangeney and Heidmann, Proc Natl Acad Sci USA, 1998, 95:14920-14925; Mangeney et al., Proc Natl Acad Sci USA, 2007, 104(51):20534-9).

The rationale of the assay can be summarized as follows: while injection of MCA205 tumor cells (H-2^(b)) into allogeneic Balb/c mice (H-2^(d)) leads to the formation of no tumor or transient tumors that are rapidly rejected, injection of the same cells, but stably expressing an immunosuppressive retroviral Env protein, leads to the growth of larger tumors that persist for a longer time-in spite of the expression of the new exogenous antigen.

This difference is not associated with a difference in intrinsic cell growth rate since it is not observed in syngeneic C57BL/6 mice, and is immune system-dependent.

The extent of “immunosuppression” can be quantified by an index based on tumor size: (A_(env)-A_(none))/A_(none), where A_(env) and A_(none) are the mean areas at the peak of growth of tumors from Balb/c mice injected with env-expressing or control cells, respectively. A positive index indicates that env expression facilitates tumor growth, as a consequence of its immunosuppressive activity; a null or negative index points to no effect or even an inhibitory effect, respectively. The latter can be explained by a stimulation of the immune response of the host against the new foreign antigen, represented by a non-immunosuppressive Env protein, expressed at the surface of tumor cells. Accordingly, as illustrated in FIG. 2, it can be observed that the FIV env is immunosuppressive, and that this activity is carried by a 64-mer peptide of the transmembrane (TM) subunit of the envelope protein. The immunosuppression indexes are close to those found for non-lentiviral env proteins (such as that of the murine MLV retrovirus shown in the figure as a control, together with a non-immunosuppressive mutant).

Identification of the FIV Env Amino-Acids Critical for Immunosuppression and its Inhibition, Via R-Scanning

To characterize further the immunosuppressive domain (ISD) of the FIV env active in vivo, we analyzed the effect of a series of amino-acid substitutions within the FIV env 64 aa domain shown to carry the IS activity (see above). The 64-aa FIV env domain is embedded into the so-called ectodomain, which corresponds to the extracellular domain of the TM subunit, and consists in the α-helical domain involved in FIV TM trimerization, and the N-term part of the loop containing the 2 well-conserved, 6/7 aa-distant, cysteine residues found in most retroviral envelopes. Refine delineation of the amino acis responsible for IS activity was thus performed by arginine-scanning within this domain. As illustrated in FIG. 3, X-to-Arg substitutions resulted in a significant change in the IS activity of the FIVenv 64 aa domain, with maximum effect observed for the F687 position and to a lesser—but significant—extent for the adjacent E685, K686, L688 and Y689 positions. A series of other substitutions are performed at the F687 position, substitutions for the small A and G, and the hydrophobic L and F residues.

We also analyzed the effect of this series of amino-acid substitutions within the FIVenv 64 aa domain by measuring the production of anti-FIV env IgG antibodies in mice inoculated under syngenic conditions (C57B1/6 mice) with the cells expressing the wild-type and mutant FIVenv 64 aa domains. As illustrated in FIG. 4, X-to-Arg subsitutions resulted in an increase in the antibody response, consistent with an increased immunogenicity of FIVenv 64, with again a more important effect observed for the F687 position.

Additionally, a series of experiments were performed with recombinant proteins containing the FIVenv 64 domain, to assay the relative immunogenicity of the wt and mutants proteins. The domains were fused with the carrier MBP (Maltose Binding Protein), and the proteins were injected i.v. into Balb/C mice (see Materials and Methods). The immunosuppressive effects of the FIVenv 64 wt and mutants were assayed by measuring the inhibition of the anti-MBP antibody response raised in the injected mice. As illustrated in FIG. 5, a significant decrease—relative to the control (MBP-LacZα)—is observed with FIVenv 64 wt, consistent with its immunosuppressive activity acting in cis, whereas almost no reduction is observed for the F687R and L688R mutants, indicative of the loss of its IS activity. A similar effect is observed for the other mutants, although at a lesser extent.

Impact of the Identified Mutations on Env Protein Folding and Proper Expression as a Functional Transmembrane Protein

We then tested whether the above-mentioned substitutions alter the overall capacity of the FIV envelope to be expressed by an eucaryotic cell and to be exported at the cell membrane, by introducing the mutants into an expression vector for the full-length FIV envelope. A FACS analysis of cells transfected with the wild-type and the mutant FIV envelope genes inserted within a CMV-driven expression vector (see Materials and Methods) and using an anti-SU specific monoclonal antibody, demonstrated quantitative expression of the mutant envelopes at the cell surface (FIG. 6). In particular, this analysis indicated that the F687R and L688R mutations did not significantly altered the FIV Env structure and/or SU-TM interaction. Finally, the fusogenic activity of the FIV full-length envelopes was tested by a cell-cell fusion assay, in which cells prone to FIVenv-mediated fusion were tranfected as above with the corresponding expression vectors, and cell-cell fusion monitored 24-48 h post transfection by measuring the amount of multi-nucleated syncytia formed, with the process being quantified by a fusion index (see Materials and Methods). As illustrated in FIG. 7 and despite the conservation of the amount of env protein expressed at the cell surface (cf FIG. 6), variations in the fusion index exist among the various env mutants tested, although all of them remain fusion-positive,

Accordingly, the present investigation has clearly identified definite positions and definite substitutions within the FIV env resulting in the loss of its IS activity.

Being compatible with the conservation of the overall structure of the FIV Env protein, these substitutions should be introduced in all pharmaceutical preparations which include the Env protein as a vaccine antigen.

Materials and Methods

Mice and Cell Lines:

C57B1/6 and Balb/c mice, 6-10 weeks old, were obtained from Harlan (France). Mice were maintained in the animal facility of the Gustave Roussy Institute in accordance with institutional regulations. 293T (ATCC CRL11268), and MCA205 cells were cultured in DMEM supplemented with 10% fetal calf serum (Invitrogen), streptomycin (100 μg/m1) and penicillin (100 units/ml).

Plasmids Constructions:

-   -   phCMV-FIVenv: The pET34TF10 full feline immunodeficiency virus         (FIV) genome clone (strain petaluma) (Talbott et al., Proc Natl         Acad Sci USA, 1989, 86(15):5743-4747) served as template to         generate full-length FIVenv PCR fragment using primers 1-2. This         PCR fragment was digested with XhoI and MluI restriction enzymes         to be ligated with phCMV vector opened with the same enzymes to         generate a phCMV-FIVenv expression vector.     -   phCMV-FIVenv mutants: Mutated phCMV-FIVenv was obtained by         successive

PCR using appropriate primers. A first series of PCRs was performed with phCMV-FIVenv as template with primer 3 and the reverse primer designed with the mutation (i.e. primers 5, 7, 9, 11, 13, 15, 17, 19, 21, 23); and primer 2 and the forward primer bearing the mutation (i.e. primers 4, 6, 8, 10, 12, 13, 14, 16, 18, 20, 22) to introduce the mutations E685A, E685R, K686A, K686R, F687A, F687R, L688A, L688R, Y689A and Y689R, respectively. The two PCR fragments bearing the same mutation were purified and mixed to be used as template for a subsequent PCR with primers 3 and 2. These PCR fragments were digested by SpeI and MluI restriction enzymes and purified. In the meantime the FIVenv fragment obtained after digestion of the phCMV-FIVenv with the XhoI and SpeI restriction enzymes was purified. A three-fragment ligation with phCMV opened with XhoI and MluI, the FIVenv fragment digested with XhoI and SpeI, and the SpeI-MluI-restricted PCR fragment with the desired mutation, was performed to obtain the phCMV-FIVenv mutants.

-   -   Mutations of the amino acids E685, K686 and Y689 into G, L or F,         mutations of the amino acid F687 into G or L, and mutations of         the amino acid L688 into G or F are similarly performed using         appropriate primers pairs (i.e. primers 31-58).     -   pDFG-FIVenv and pDFG-FIVenv mutants: FIVenv and FIVenv mutant         inserts were obtained by restriction with Agel and MluI of the         phCMV-FIVenv and mutants. These inserts were ligated with         pDFG-ectoSyncytin-1 (see above Mangeney et al, PNAS, 2007)         opened with the same enzymes.     -   pDFG-FIV64 and pDFG-FIV112, wild-type and mutants: fragments of         the FIVenv, wild-type and mutants, were PCR-amplified from         phCMV-FIVenv using primers 24-25 or 24-26 to obtain FIV64 and         FIV112 fragments, respectively. These PCR fragments were         digested with SfiI and MluI and inserted into         pDFG-ectoSyncytin-1 (see above Mangeney et al, PNAS, 2007)         opened with the same enzymes.     -   pSIN-FIV64: This vector was based on the lentiviral vector         pHR'SIN-cPPT-SEW described in Demaison et al. (Human Gene         Therapy, 2002, 13:803-813). The pSIN-FIV64 vectors were obtained         by insertion of the hygromycin resistance gene under the control         of the phosphoglycerate kinase promoter (PGK) at the end of WPRE         sequence of pHR'SIN-cPPT-SEW. Then the FIV-64 fragments, wt and         mutants, were PCR-amplified from pDFG-FIV64 wt and mutants,         using primers 27-28, digested with Bam HI and Not I, and         inserted downstream the pSec sequence under control of the SFFV         promoter.     -   pMal-MBP-FIV: Bacterial expression vectors for fusion proteins         with E. coli maltose-binding protein (MBP) were constructed by         ligation of a modified pMal-c2x (described in Center et al.,         Protein Sci, 1998, 7(7):1612-1619) opened with PstI and HindIll,         with the FIV-env ectodomain, wt and mutants, obtained by PCR         from phCMV Env wt and mutants, with primer pair 29-30. These         pMal-MBP-FIV64 vectors encode a 64-residue long FIV-ectodomain         fused to the C terminus of MBP through a trialanine linker. The         empty pMal-c2x vector encodes the 85-residue long α-subunit         of E. coli β-galactosidase fused to the C terminus of MBP and         was used as a control (pMal-LacZa).

All the constructions were sequenced before use.

TABLE 2 Primer list No Name Primer sequence (5′-3′) SEQ ID NO: 1 FIV env Xho Age atacatCTCGAGACCGGTccaactagaaccATGGCAGA 348 Kozak ATG (FOR) AGGATTTGCAGCC 2 FIV env Stop Mlu ATACATacgcgtTCATTCCTCCTCTTTTTCAGAC 349 (REV) ATGCCAC 3 FIV-env-2000-FOR TACTGCTATAGGGATGGTAACACAATACCAC 350 CAAG 4 FIV-env-E685A- GATTAAAAGTAGAAGCTATGGCAAAATTTTT 351 FOR GTATACAGC 5 FIV-env-E685A- GCTGTATACAAAAATTTTGCCATAGCTTCTA 352 REV CTTTTAATC 6 FIV-env-E685R- GATTAAAAGTAGAAGCTATGAGAAAATTTTT 353 FOR GTATACAGC 7 FIV-env-E685R- GCTGTATACAAAAATTTTCTCATAGCTTCTAC 354 REV TTTTAATC 8 FIV-env-K686A- GTAGAAGCTATGGAAGCATTTTTGTATACAG 355 FOR CTTTC 9 FIV-env-K686A- GAAAGCTGTATACAAAAATGCTTCCATAGCT 356 REV TCTAC 10 FIV-env-K686R- GTAGAAGCTATGGAAAGATTTTTGTATACAG 357 FOR CTTTC 11 FIV-env-K686R- GAAAGCTGTATACAAAAATCTTTCCATAGCT 358 REV TCTAC 12 FIV-env-F687A- GAAGCTATGGAAAAAGCCTTGTATACAGCTT 359 FOR TC 13 FIV-env-F687A- GAAAGCTGTATACAAGGCTTTTTCCATAGCT 360 REV TC 14 FIV-env-F687R- GAAGCTATGGAAAAAAGATTGTATACAGCTT 361 FOR TC 15 FIV-env-F687R- GAAAGCTGTATACAATCTTTTTTCCATAGCTTC 362 REV 16 FIV-env-L688A- GCTATGGAAAAATTTGCCTATACAGCTTTCG 363 FOR CTATG 17 FIV-env-L688A- CATAGCGAAAGCTGTATAGGCAAATTTTTCC 364 REV ATAGC 18 FIV-env-L688R- GCTATGGAAAAATTTAGGTATACAGCTTTCG 365 FOR CTATG 19 FIV-env-L688R- CATAGCGAAAGCTGTATACCTAAATTTTTCC 366 REV ATAGC 20 FIV-env-Y689A- CTATGGAAAAATTTTTGGCCACAGCTTTCGC 367 FOR TATGC 21 FIV-env-Y689A- GCATAGCGAAAGCTGTGGCCAAAAATTTTTC 368 REV CATAG 22 FIV-env-Y689R- CTATGGAAAAATTTTTGCGGACAGCTTTCGC 369 FOR TATGC 23 FIV-env-Y689R- GCATAGCGAAAGCTGTCCGCAAAAATTTTTC 370 REV CATAG 24 FIV64-Sfi-FOR GGTGACGCGGCCCAGCCGGCCgctatagaaaaggtga 371 ctggagcc 25 FIV64-Mlu-REV ATACATACGCGTTTAccttgtccacaactcaagagg 372 26 FIVeq112-MLU- ATACATACGCGTTTAccctgttttcccttgtacattattttg 373 REV 27 BamHI psec-FOR ATA GGA TCC AGA ACC ATG GAG ACA GAC 435 ACA CTC 28 NotI FIV-REV TAT GC GGCC GC TTA CCT TGT CCA CAA 436 CTC AAG 29 PstI FIV72-FOR ATAGCTGCAGCCCAAGTTCTGGCAACCCAT 437 30 HindIII FIV72-REV TATAAGCTTTTACCTTGTCCACAACTCAAG 438 31 FIV-env-G678A- CATCAAGTACTAGTAATAGCATTAAAAGTAG 439 FOR AAGCTATG 32 FIV-env-G678A- CATAGCTTCTACTTTTAATGCTATTACTAGTA 440 REV CTTGATG 33 FIV-env-E685G- GATTAAAAGTAGAAGCTATGGGAAAATTTTT 441 FOR GTATACAGC 34 FIV-env-E685G- GCTGTATACAAAAATTTTCCCATAGCTTCTAC 442 REV TTTTAATC 35 FIV-env-E685L- GATTAAAAGTAGAAGCTATGTTAAAATTTTT 443 FOR GTATACAGC 36 FIV-env-E685L- GCTGTATACAAAAATTTTAACATAGCTTCTA 444 REV CTTTTAATC 37 FIV-env-K686G- GTAGAAGCTATGGAAGGATTTTTGTATACAG 445 FOR CTTTC 38 FIV-env-K686G- GAAAGCTGTATACAAAAATCCTTCCATAGCT 446 REV TCTAC 39 FIV-env-K686L- GTAGAAGCTATGGAATTATTTTTGTATACAG 447 FOR CTTTC 40 FIV-env-K686L- GAAAGCTGTATACAAAAATAATTCCATAGCT 448 REV TCTAC 41 FIV-env-F687G- GAAGCTATGGAAAAAGGATTGTATACAGCTT 449 FOR TC 42 FIV-env-F687G- GAAAGCTGTATACAATCCTTTTTCCATAGCTTC 450 REV 43 FIV-env-F687L- GAAGCTATGGAAAAATTATTGTATACAGCTT 451 FOR TC 44 FIV-env-F687L- GAAAGCTGTATACAATAATTTTTCCATAGCTTC 452 REV 45 FIV-env-L688G- GCTATGGAAAAATTTGGATATACAGCTTTCG 453 FOR CTATG 46 FIV-env-L688G- CATAGCGAAAGCTGTATATCCAAATTTTTCC 454 REV ATAGC 47 FIV-env-Y689G- CTATGGAAAAATTTTTGGGAACAGCTTTCGC 455 FOR TATGC 48 FIV-env-Y689G- GCATAGCGAAAGCTGTTCCCAAAAATTTTTC 456 REV CATAG 49 FIV-env-Y689L- CTATGGAAAAATTTTTGTTAACAGCTTTCGCT 457 FOR ATGC 50 FIV-env-Y689L- GCATAGCGAAAGCTGTTAACAAAAATTTTTC 458 REV CATAG 51 FIV-env-E685F- GATTAAAAGTAGAAGCTATGTTTAAATTTTT 459 FOR GTATACAGC 52 FIV-env-E685F- GCTGTATACAAAAATTTAAACATAGCTTCTA 460 REV CTTTTAATC 53 FIV-env-K686F- GTAGAAGCTATGGAATTTTTTTTGTATACAGC 461 FOR TTTC 54 FIV-env-K686F- GAAAGCTGTATACAAAAAAAATTCCATAGCT 462 REV TCTAC 55 FIV-env-L688F- GCTATGGAAAAATTTTTTTATACAGCTTTCGC 463 FOR TATG 56 FIV-env-L688F- CATAGCGAAAGCTGTATAAAAAAATTTTTCC 464 REV ATAGC 57 FIV-env-Y689F- CTATGGAAAAATTTTTGTTTACAGCTTTCGCT 465 FOR ATGC 58 FIV-env-Y689F- GCATAGCGAAAGCTGTAAACAAAAATTTTTC 466 REV CATAG

Recombinant Proteins:

Recombinant proteins were produced using BL21 (DE3) Escherichia coli cells (Stratagene) and pMal-derived expression vectors (New England Biolabs, France). Recombinant WT and mutants TM subunit ectodomains were soluble and were purified on on cross-linked Amylose Resin (New England Biolabs, France) packed in column with PBS as a binding and washing buffer and 20 mM Tris-C1, 5 mM maltose, pH 7.5, as an elution buffer. Proteins were then dialysed against phosphate-buffered saline pH 7,4 (PBS), and endotoxins were removed using Endotrap Blue Resin (Hyglos GmbH, Germany) according to manufacturer's protocol.

Establishment of Env-Expressing Tumor Cells and MCA205 Tumor-Rejection Assay:

7.5×10⁵ 293 T cells were cotransfected with the env-expressing pDFG retroviral vector to be tested (1.75 μg) and expression vectors for the MLV proteins (0.55 μg for the amphotropic MLV env vector and 1.75 μg for the MLV gag and pol vector). 36 hours post-transfection, supernatants were harvested for infection of MCA205 tumor cells (2.5 ml of supernatant per 5×10⁵ cells with 4 μg/m1 polybrene). Cells were maintained in selective medium (400 units/ml hygromycin) for 3 weeks, and then washed with PBS, trypsinized and inoculated subcutaneously in the shaved area of each mouse right flank as in Mangeney et al (see above PNAS 1998, PNAS 2007). Tumor growth was monitored by palpation twice or thrice weekly and tumor area (mm²) determined by measuring perpendicular tumor diameters. The extent of “immunosuppression” was quantified by an index based on tumor size: (A_(env)-A_(none))/A_(none), where A_(env) and A_(none) are the mean areas at the peak of growth of tumors from Balb/c mice injected with env-expressing or control cells, respectively.

Analysis of the Antibody Response of Mice Inoculated with MCA205-Tranduced Cells Expressing FIV64 Env Wild-Type and Mutants:

the MCA205-transduced cells were also inoculated as above into syngenic mice (C57B1/6) and sera were collected 1, 2, and 3 weeks after injection. The antibody response against FIV64 env was assayed by ELISA. Briefly, several dilutions of the sera were incubated 1 h at RT on a plate pre-coated with 1 ng/ml of MBP-FIV64, and antibody binding was analysed by using a labeled anti-mouse IgG secondary antibody (GE Healthcare, UK).

Analysis of FIVenv Expression:

3×10⁵ 293 T cells were transfected with 2 μg of the expression vector for the FIV envelope (phCMV) either wild-type or mutated at the indicated positions using Fugene HD (Roche). Cells were washed 16 h later and then harvested 2 days post-transfection using PBS-EDTA 5 mM. The SU1-30 monoclonal antibody (Antibodies online, BmbH, Germany) was used (1/200 dilution) to stain the FIV envelope. As a secondary antibody, we used the goat anti mouse IgG Alexa 488 (1/400) (Invitrogen). Fluorescence was acquired by flow cytometry using a FACS Calibur (BD Biosciences), and data analysed by the CellQuest software (BD Biosciences).

Cell-Cell Fusion Assays:

For cell-cell fusion assays, 5×10⁴ to 1×10⁵ cells seeded in 24-well plates were transfected by using lipofectamine LTX (Life technologies) with 250 ng of env expression plasmid. Fusion activity of each envelope protein was visualized 24 to 48 h after transfection by May-Grunwald and Giemsa staining, according to the manufacturer's instructions (Sigma). The fusion index, which represents the percentage of fusion events in a cell population, is defined as [(N−S)/T]×100), where N is the number of nuclei in the syncytia, S is the number of syncytia, and T is the total number of nuclei counted 

1. Pharmaceutical composition comprising as active substance an isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof, in particular said fragment of said isolated mutated feline lentiviral ENV protein comprising at least 40 amino acids, in particular at least 60 amino acids, said mutated feline lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type feline lentiviral ENV protein, said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 5, said mutated feline lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence: (SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A,

wherein, X₁ is A, F, G, L or R, and X₂, X₃, X₄ and X₅ are any amino acid, or X₂ is A, F, G, L or R, and X₁, X₃, X₄ and X₅ are any amino acid, or X₃ is A, G, L or R, and X₁, X₂, X₄ and X₅ are any amino acid, or X₄ is A, F, G or R, and X₁, X₂, X₃ and X₅ are any amino acid, or X₅ is A, F, G, L or R, and X₁, X₂, X₃ and X₄ are any amino acid, in association with a pharmaceutically acceptable carrier.
 2. Pharmaceutical composition comprising as active substance an isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof, in particular said fragment of said isolated mutated feline lentiviral ENV protein comprising at least 40 amino acids, in particular at least 60 amino acids, said mutated feline lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type feline lentiviral ENV protein, said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 5, said mutated feline lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence: (SEQ ID NO: 3) [V/I]-[E/R]-A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A-[F/L]- A-M,

wherein, X₁ is A, F, G, L or R, and X₂, X₃, X₄ and X₅ are any amino acid, or X₂ is A, F, G, L or R, and X₁, X₃, X₄ and X₅ are any amino acid, or X₃ is A, G, L or R, and X₁, X₂, X₄ and X₅ are any amino acid, or X₄ is A, F, G or R, and X₁, X₂, X₃ and X₅ are any amino acid, or X₅ is A, F, G, L or R, and X₁, X₂, X₃ and X₄ are any amino acid, in association with a pharmaceutically acceptable carrier.
 3. Pharmaceutical composition according to claim 1 comprising as active substance an isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof, said mutated feline lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type feline lentiviral ENV protein, said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 5, said mutated feline lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence: (SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A,

X₁ is A, F, G, L or R, and X₂, X₃, X₄ and X₅ are any amino acid, or X₂ is A, F, G, L or R, and X₁, X₃, X₄ and X₅ are any amino acid, or X₃ is A, G, L or R, and X₁, X₂, X₄ and X₅ are any amino acid, or X₄ is A, F, G or R, and X₁, X₂, X₃ and X₅ are any amino acid, or X₅ is A, F, G, L or R, and X₁, X₂, X₃ and X₅ are any amino acid, in association with a pharmaceutically acceptable carrier, said decrease, substantial absence or absence of immunosuppressive activity of the above mentioned mutated feline lentiviral ENV protein or of the above defined fragment being liable to be assessed by the fact that in an in vivo assay involving engrafted tumor cells rejection, in animals excluding human beings, said tumor cells being transduced either so as to express said mutated ENV protein or said fragment (mutated ENV tumor cells), or said tumor cells being transduced so as to express said wild type ENV protein or a fragment thereof (wild type ENV tumor cells), or said tumor cells being not transduced (normal tumor cells), the following ratio: immunosuppression index of said mutated ENV protein or of said fragment (i_(mutated env))/immunosuppression index of wild type ENV protein (i_(wild type env)) is less than 0.5, or even less than 0.25, i_(mutated env) being defined by: (maximum area reached by mutated ENV tumor cells−maximum area reached by normal tumor cells)/(maximum area reached by normal tumor cells), and i_(wild type env) being defined by: (maximum area reached by wild type ENV tumor cells−maximum area reached by normal tumor cells)/(maximum area reached by normal tumor cells).
 4. Pharmaceutical composition according to claim 1, wherein: X₁ is A, F, G, L or R, X₂ is A, F, G, L or R, and X₃, X₄ and X₅ are any amino acid, or X₁ is A, F, G, L or R, X₃ is A, G, L or R, and X₂, X₄ and X₅ are any amino acid, or X₁ is A, F, G, L or R, X₄ is A, F, G or R, and X₂, X₃ and X₅ are any amino acid, or X₁ is A, F, G, L or R, X₅ is A, F, G, L or R, and X₂, X₃ and X₄ are any amino acid, or X₂ is A, F, G, L or R, X₃ is A, G, L or R, and X₁, X₄ and X₅ are any amino acid, or X₂ is A, F, G, L or R, X₄ is A, F, G or R, and X₁, X₃ and X₅ are any amino acid, or X₂ is A, F, G, L or R, X₅ is A, F, G, L or R, and X₁, X₃ and X₄ are any amino acid, or X₃ is A, G, L or R, X₄ is A, F, G or R, and X₁, X₂ and X₅ are any amino acid, or X₃ is A, G, L or R, X₅ is A, F, G, L or R, and X₁, X₂ and X₄ are any amino acid, or X₄ is A, F, G or R, X₅ is A, F, G, L or R, and X₁, X₂ and X₃ are any amino acid.
 5. Pharmaceutical composition according to claim 1, wherein: X₁ is A, G or R, and X₂, X₃, X₄ and X₅ are any amino acid, or X₂ is A, G or R, and X₁, X₃, X₄ and X₅ are any amino acid, or X₃ is A, G or R, and X₁, X₂, X₄ and X₅ are any amino acid, or X₄ is A, G or R, and X₁, X₂, X₃ and X₅ are any amino acid, or X₅ is A, G or R, and X₁, X₂, X₃ and X₄ are any amino acid, in particular: X₁ is R, and X₂, X₃, X₄ and X₅ are any amino acid, or X₂ is R, and X₁, X₃, X₄ and X₅ are any amino acid, or X₃ is R, and X₁, X₂, X₄ and X₅ are any amino acid, or X₄ is R, and X₁, X₂, X₃ and X₅ are any amino acid, or X₅ is R, and X₁, X₂, X₃ and X₄ are any amino acid.
 6. Pharmaceutical composition according to claim 1, wherein: X₁ is A, G or R, X₂ is A, G or R, and X₃, X₄ and X₅ are any amino acid, or X₁ is A, G or R, X₃ is A, G or R, and X₂, X₄ and X₅ are any amino acid, or X₁ is A, G or R, X₄ is A, G or R, and X₂, X₃ and X₅ are any amino acid, or X₁ is A, G or R, X₅ is A, G or R, and X₂, X₃ and X₄ are any amino acid, or X₂ is A, G or R, X₃ is A, G or R, and X₁, X₄ and X₅ are any amino acid, or X₂ is A, G or R, X₄ is A, G or R, and X₁, X₃ and X₅ are any amino acid, or X₂ is A, G or R, X₅ is A, G or R, and X₁, X₃ and X₄ are any amino acid, or X₃ is A, G or R, X₄ is A, G or R, and X₁, X₂ and X₅ are any amino acid, or X₃ is A, G or R, X₅ is A, G or R, and X₁, X₂ and X₄ are any amino acid, or X₄ is A, G or R, X₅ is A, G or R, and X₁, X₂ and X₃ are any amino acid, in particular: X₁ is R, X₂ is R, and X₃, X₄ and X₅ are any amino acid, or X₁ is R, X₃ is R, and X₂, X₄ and X₅ are any amino acid, or X₁ is R, X₄ is R, and X₂, X₃ and X₅ are any amino acid, or X₁ is R, X₅ is R, and X₂, X₃ and X₄ are any amino acid, or X₂ is R, X₃ is R, and X₁, X₄ and X₅ are any amino acid, or X₂ is R, X₄ is R, and X₁, X₃ and X₅ are any amino acid, or X₂ is R, X₅ is R, and X₁, X₃ and X₄ are any amino acid, or X₃ is R, X₄ is R, and X₁, X₂ and X₅ are any amino acid, or X₃ is R, X₅ is R, and X₁, X₂ and X₄ are any amino acid, or X₄ is R, X₅ is R, and X₁, X₂ and X₃ are any amino acid.
 7. Pharmaceutical composition according to claim 1, wherein: X₁ is A, G or R, and X₂, X₃, X₄ and X₅ are any amino acid different from A, G or R, or X₂ is A, G or R, and X₁, X₃, X₄ and X₅ are any amino acid different from A, G or R, or X₃ is A, G or R, and X₁, X₂, X₄ and X₅ are any amino acid different from A, G or R, or X₄ is A, G or R, and X₁, X₂, X₃ and X₅ are any amino acid different from A, G or R, or X₅ is A, G or R, and X₁, X₂, X₃ and X₄ are any amino acid different from A, G or R, in particular: X₁ is R, and X₂, X₃, X₄ and X₅ are any amino acid different from A, G or R, or X₂ is R, and X₁, X₃, X₄ and X₅ are any amino acid different from A, G or R, or X₃ is R, and X₁, X₂, X₄ and X₅ are any amino acid different from A, G or R, or X₄ is R, and X₁, X₂, X₃ and X₅ are any amino acid different from A, G or R, or X₅ is R, and X₁, X₂, X₃ and X₄ are any amino acid different from A, G or R.
 8. Pharmaceutical composition according to claim 1, wherein: X₁ is A, G or R, X₂ is A, G or R, and X₃, X₄ and X₅ are any amino acid different from A, G or R, or X₁ is A, G or R, X₃ is A, G or R, and X₂, X₄ and X₅ are any amino acid different from A, G or R, or X₁ is A, G or R, X₄ is A, G or R, and X₂, X₃ and X₅ are any amino acid different from A, G or R, or X₁ is A, G or R, X₅ is A, G or R, and X₂, X₃ and X₄ are any amino acid different from A, G or R, or X₂ is A, G or R, X₃ is A, G or R, and X₁, X₄ and X₅ are any amino acid different from A, G or R, or X₂ is A, G or R, X₄ is A, G or R, and X₁, X₃ and X₅ are any amino acid different from A, G or R, or X₂ is A, G or R, X₅ is A, G or R, and X₁, X₃ and X₄ are any amino acid different from A, G or R, or X₃ is A, G or R, X₄ is A, G or R, and X₁, X₂ and X₅ are any amino acid different from A, G or R, or X₃ is A, G or R, X₅ is A, G or R, and X₁, X₂ and X₄ are any amino acid different from A, G or R, or X₄ is A, G or R, X₅ is A, G or R, and X₁, X₂ and X₃ are any amino acid different from A, G or R, in particular: X₁ is R, X₂ is R, and X₃, X₄ and X₅ are any amino acid different from A, G or R, or X₁ is R, X₃ is R, and X₂, X₄ and X₅ are any amino acid different from A, G or R, or X₁ is R, X₄ is R, and X₂, X₃ and X₅ are any amino acid different from A, G or R, or X₁ is R, X₅ is R, and X₂, X₃ and X₄ are any amino acid different from A, G or R, or X₂ is R, X₃ is R, and X₁, X₄ and X₅ are any amino acid different from A, G or R, or X₂ is R, X₄ is R, and X₁, X₃ and X₅ are any amino acid different from A, G or R, or X₂ is R, X₅ is R, and X₁, X₃ and X₄ are any amino acid different from A, G or R, or X₃ is R, X₄ is R, and X₁, X₂ and X₅ are any amino acid different from A, G or R, or X₃ is R, X₅ is R, and X₁, X₂ and X₄ are any amino acid, different from A, G or R or X₄ is R, X₅ is R, and X₁, X₂ and X₃ are any amino acid different from A, G or R.
 9. Pharmaceutical composition according to claim 1, wherein: (SEQ ID NO: 489) A-[I/M/T/L]-[A/G/R]-K-[F/P]-[L/V/I]-Y-T-A, or (SEQ ID NO: 490) A-[I/M/T/L]-E-[A/G/R]-[F/P]-[L/V/I]-Y-T-A, or (SEQ ID NO: 491) A-[I/M/T/L]-E-K-[A/G/R]-[L/V/I]-Y-T-A, or (SEQ ID NO: 492) A-[I/M/T/L]-E-K-[F/P]-[A/G/R]-Y-T-A, or (SEQ ID NO: 493) A-[I/M/T/L]-E-K-[F/P]-[L/V/I]-[A/G/R]-T-A, or (SEQ ID NO: 494) A-[I/M/T/L]-E-K-[A/G/R]-[A/G/R]-Y-T-A, in particular: (SEQ ID NO: 489) A-[I/M/T/L]-[A/G/R]-K-[F/P]-[L/V/I]-Y-T-A, or (SEQ ID NO: 495) A-[I/M/T/L]-E-G-[F/P]-[L/V/I]-Y-T-A, or (SEQ ID NO: 491) A-[I/M/T/L]-E-K-[A/G/R]-[L/V/I]-Y-T-A, or (SEQ ID NO: 492) A-[I/M/T/L]-E-K-[F/P]-[A/G/R]-Y-T-A, or (SEQ ID NO: 496) A-[I/M/T/L]-E-K-[F/P]-[L/V/I]-G-T-A, or (SEQ ID NO: 494) A-[I/M/T/L]-E-K-[A/G/R]-[A/G/R]-Y-T-A.


10. Pharmaceutical composition according to claim 1, wherein: (SEQ ID NO: 497) A-[I/M/T/L]-R-K-[F/P]-[L/V/I]-Y-T-A, or (SEQ ID NO: 498) A-[I/M/T/L]-E-R-[F/P]-[L/V/I]-Y-T-A, or (SEQ ID NO: 499) A-[I/M/T/L]-E-K-R-[L/V/I]-Y-T-A, or (SEQ ID NO: 500) A-[I/M/T/L]-E-K-[F/P]-R-Y-T-A, or (SEQ ID NO: 501) A-[I/M/T/L]-E-K-[F/P]-[L/V/I]-R-T-A, or (SEQ ID NO: 502) A-[I/M/T/L]-E-K-R-R-Y-T-A.


11. Pharmaceutical composition according to claim 1, wherein said isolated mutated feline lentiviral ENV protein or said fragment thereof, comprises one of the amino acid sequences SEQ ID NO: 28 to
 171. 12. Pharmaceutical composition according to claim 1, wherein said isolated mutated feline lentiviral ENV protein consists of one of the amino acid sequences: SEQ ID NO: 5 and SEQ ID NO: 317 to 342 and 374 to
 419. 13. Pharmaceutical composition comprising as active substance a nucleic acid molecule coding for a mutated feline lentiviral ENV protein, or a fragment of said mutated feline lentiviral ENV protein, as defined in claim
 1. 14. Pharmaceutical composition according to claim 13, wherein said nucleic acid molecule is contained in a vector, said vector comprising means allowing the expression of the mutated feline lentiviral ENV protein, or a fragment of said mutated feline lentiviral ENV protein, as previously defined, in particular, wherein said vector is chosen among a canarypox vector, a pox vector, a fowlpox, an adenoviral vector, a lentiviral vector, a measles vector, a Sendaï virus vector, a Cytomegalovirus vector or a Modified Vaccinia Ankara vector.
 15. Pharmaceutical composition according to claim 14, comprising at least one nucleic acid molecule coding for a GAG protein and/or a PRO protein and/or a POL protein of a feline lentivirus, said lentivirus being preferably of the same origin as the mutated lentiviral ENV protein, in particular, wherein said nucleic acid molecule coding for a mutated feline lentiviral ENV protein, or a fragment of said mutated feline lentiviral ENV protein, is contained in the same vector as the one which also contains said at least one nucleic acid molecule coding for a GAG protein and/or a PRO protein and/or a POL protein.
 16. Pharmaceutical composition as defined in claim 1 for its use for stimulating an immune response in a host organism, in particular, for its use for the prevention or the treatment of lentiviral infection, preferably FIV infection, in particular, for its use as a vaccine, in particular against FIV infection.
 17. Method to obtain the active substance of a pharmaceutical composition, as defined in claim 1, consisting in modifying the immunosuppressive property of: a wild-type feline lentiviral ENV protein, or a fragment of said wild-type feline lentiviral ENV protein, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids, said ENV protein or fragment thereof presenting a transmembrane subunit (TM) comprising an immunosuppressive domain (ISU) containing the following amino acid sequence: (SEQ ID NO: 344) A-[I/M/T/L]-X_(A)-X_(B)-X_(C)-X_(D)-X_(E)-T-A,

wherein X_(A) is E, and X_(E) is K, and X_(C) is F or P, and X_(D) is L, V or I, and X_(E) is Y, said method comprising a step of introduction of at least one mutation of X_(A) and/or X_(E) and/or X_(C) and/or X_(D) and/or X_(E), to obtain: an isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said mutated feline lentiviral ENV protein having at least 70% identity, preferably at least 80% identity, to one sequence SEQ ID NO: 5, or a fragment of said isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, said fragment comprising at least 40 amino acids, in particular at least 60 amino acids, said mutated ENV protein and fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino sequence: (SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A,

wherein X₁ is any amino acid different from E, and X₂, X₃, X₄ and X₅ are any amino acid, or X₂ is any amino acid different from K, and X₁, X₃, X₄ and X₅ are any amino acid, or X₃ is any amino acid different from F, and X₁, X₂, X₄ and X₅ are any amino acid, or X₄ is any amino acid different from L, and X₁, X₂, X₃ and X₅ are any amino acid, or X₅ is any amino acid different from Y, and X₁, X₂, X₃ and X₄ are any amino acid, in particular, wherein X₁ is R, G, L, A or F, and X₂, X₃, X₄ and X₅ are any amino acid, or X₂ is R, G, L, A or F, and X₁, X₃, X₄ and X₅ are any amino acid, or X₃ is R, G, L or A, and X₁, X₂, X₄ and X₅ are any amino acid, or X₄ is R, G, A or F, and X₁, X₂, X₃ and X₅ are any amino acid, or X₅ is R, G, L, A or F and X₁, X₂, X₃ and X₄ are any amino acid.
 18. Pharmaceutical composition according to claim 2, comprising as active substance an isolated mutated feline lentiviral ENV protein having a decreased immunosuppressive activity, substantially no immunosuppressive activity or no immunosuppressive activity, or a fragment thereof, said mutated feline lentiviral ENV protein resulting from mutation of the transmembrane (TM) subunit of a wild type feline lentiviral ENV protein, said mutated ENV protein having at least 70% identity, preferably at least 80% identity, to the sequence SEQ ID NO: 5, said mutated feline lentiviral ENV protein or fragment thereof comprising a mutated immunosuppressive domain (ISU) containing the following amino acid sequence: (SEQ ID NO: 1) A-[I/M/T/L]-X₁-X₂-X₃-X₄-X₅-T-A,

wherein, X₁ is A, F, G, L or R, and X₂, X₃, X₄ and X₅ are any amino acid, or X₂ is A, F, G, L or R, and X₁, X₃, X₄ and X₅ are any amino acid, or X₃ is A, G, L or R, and X₁, X₂, X₄ and X₅ are any amino acid, or X₄ is A, F, G or R, and X₁, X₂, X₃ and X₅ are any amino acid, or X₅ is A, F, G, L or R, and X₁, X₂, X₃ and X₅ are any amino acid, in association with a pharmaceutically acceptable carrier, said decrease, substantial absence or absence of immunosuppressive activity of the above mentioned mutated feline lentiviral ENV protein or of the above defined fragment being liable to be assessed by the fact that in an in vivo assay involving engrafted tumor cells rejection, in animals excluding human beings, said tumor cells being transduced either so as to express said mutated ENV protein or said fragment (mutated ENV tumor cells), or said tumor cells being transduced so as to express said wild type ENV protein or a fragment thereof (wild type ENV tumor cells), or said tumor cells being not transduced (normal tumor cells), the following ratio: immunosuppression index of said mutated ENV protein or of said fragment (i_(mutated env))/immunosuppression index of wild type ENV protein−wild type env) is less than 0.5, or even less than 0.25, i_(mutated env) being defined by: (maximum area reached by mutated ENV tumor cells−maximum area reached by normal tumor cells)/(maximum area reached by normal tumor cells), and i_(wild type env) being defined by: (maximum area reached by wild type ENV tumor cells−maximum area reached by normal tumor cells)/(maximum area reached by normal tumor cells).
 19. Pharmaceutical composition according to claim 2, wherein: X₁ is A, F, G, L or R, X₂ is A, F, G, L or R, and X₃, X₄ and X₅ are any amino acid, or X₁ is A, F, G, L or R, X₃ is A, G, L or R, and X₂, X₄ and X₅ are any amino acid, or X₁ is A, F, G, L or R, X₄ is A, F, G or R, and X₂, X₃ and X₅ are any amino acid, or X₁ is A, F, G, L or R, X₅ is A, F, G, L or R, and X₂, X₃ and X₄ are any amino acid, or X₂ is A, F, G, L or R, X₃ is A, G, L or R, and X₁, X₄ and X₅ are any amino acid, or X₂ is A, F, G, L or R, X₄ is A, F, G or R, and X₁, X₃ and X₅ are any amino acid, or X₂ is A, F, G, L or R, X₅ is A, F, G, L or R, and X₁, X₃ and X₄ are any amino acid, or X₃ is A, G, L or R, X₄ is A, F, G or R, and X₁, X₂ and X₅ are any amino acid, or X₃ is A, G, L or R, X₅ is A, F, G, L or R, and X₁, X₂ and X₄ are any amino acid, or X₄ is A, F, G or R, X₅ is A, F, G, L or R, and X₁, X₂ and X₃ are any amino acid.
 20. Pharmaceutical composition according to claim 2, wherein: X₁ is A, G or R, and X₂, X₃, X₄ and X₅ are any amino acid, or X₂ is A, G or R, and X₁, X₃, X₄ and X₅ are any amino acid, or X₃ is A, G or R, and X₁, X₂, X₄ and X₅ are any amino acid, or X₄ is A, G or R, and X₁, X₂, X₃ and X₅ are any amino acid, or X₅ is A, G or R, and X₁, X₂, X₃ and X₄ are any amino acid, in particular: X₁ is R, and X₂, X₃, X₄ and X₅ are any amino acid, or X₂ is R, and X₁, X₃, X₄ and X₅ are any amino acid, or X₃ is R, and X₁, X₂, X₄ and X₅ are any amino acid, or X₄ is R, and X₁, X₂, X₃ and X₅ are any amino acid, or X₅ is R, and X₁, X₂, X₃ and X₄ are any amino acid. 